我正在尝试使力导向图节点崩溃，并且我可以从下面的代码中做到这一点，但这会崩溃所有目标节点，即使直接目标节点与另一个节点有另一个“边”，其中在这种情况下，我希望只能折叠边缘，即隐藏边缘并且目标节点仍然可见，因为它还有另一个父节点仍未折叠。
在下面的示例中，我将“孙子”节点链接到 2 个父“子”节点，现在，如果我折叠（或单击）链接到孙子的任何子节点，则孙子节点及其链接将折叠到父节点中（边缘）。
我正在尝试并且需要让它像它一样工作：当我单击子节点时，而不是将大子节点折叠到其中，我需要检查子节点是否有任何直接父节点，如果是，那么我只在第一次子点击时隐藏边缘，当我点击第二个子父节点时，孙子节点及其边缘会折叠到其中。
var dataset = {
"nodes": [{
"id": 223,
"type": "Parent",
"properties": {
}
}, {
"id": 136525,
"type": "Child",
"properties": {
"patient": "6090",
"batch": "70"
}
}, {
"id": 136448,
"type": "Child",
"properties": {
"patient": "6094",
"batch": "70"
}
}, {
"id": 136328,
"type": "Child",
"properties": {
"patient": "6082",
"batch": "70"
}
}, {
"id": 136305,
"type": "Child",
"properties": {
"patient": "6096",
"batch": "70"
}
}, {
"id": 136303,
"type": "Child",
"properties": {
"patient": "6093",
"batch": "70"
}
}, {
"id": 136299,
"type": "Child",
"properties": {
"patient": "6091",
"batch": "70"
}
}, {
"id": 136261,
"type": "Child",
"properties": {
"patient": "6089",
"batch": "70"
}
}, {
"id": 136212,
"type": "Child",
"properties": {
"patient": "6087",
"batch": "70"
}
}, {
"id": 136115,
"type": "Child",
"properties": {
"patient": "6078",
"batch": "70"
}
}, {
"id": 136113,
"type": "Child",
"properties": {
"patient": "6088",
"batch": "70"
}
}, {
"id": 135843,
"type": "Child",
"properties": {
"patient": "6072",
"batch": "70"
}
}, {
"id": 555,
"type": "Grandchild",
"properties": {
}
}],
"edges": [{
"id": 0,
"from": 136113,
"to": 555,
"properties": {
}
}, {
"id": 0,
"from": 136525,
"to": 555,
"properties": {
}
}, {
"id": 0,
"from": 223,
"to": 136525,
"properties": {
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"id": 0,
"from": 223,
"to": 136448,
"properties": {
}
}, {
"id": 0,
"from": 223,
"to": 136328,
"properties": {
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}, {
"id": 0,
"from": 223,
"to": 136305,
"properties": {
}
}, {
"id": 0,
"from": 223,
"to": 136303,
"properties": {
}
}, {
"id": 0,
"from": 223,
"to": 136299,
"properties": {
}
}, {
"id": 0,
"from": 223,
"to": 136261,
"properties": {
}
}, {
"id": 0,
"from": 223,
"to": 136212,
"properties": {
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}, {
"id": 0,
"from": 223,
"to": 136115,
"properties": {
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}, {
"id": 0,
"from": 223,
"to": 136113,
"properties": {
}
}, {
"id": 0,
"from": 223,
"to": 135843,
"properties": {
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}]
}
var width = 640,
height = 470;
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var force = d3.layout.force()
.size([width, height])
//gravity(0.2)
.linkDistance(height / 6)
.charge(function(node) {
if (node.type !== 'ORG') return -2000;
return -30;
});
// build the arrow.
svg.append("svg:defs").selectAll("marker")
.data(["end"]) // Different link/path types can be defined here
.enter().append("svg:marker") // This section adds in the arrows
.attr("id", function(d) {
return d;
})
.attr("viewBox", "0 -5 10 10")
.attr("refX", 12)
.attr("refY", 0)
.attr("markerWidth", 9)
.attr("markerHeight", 5)
.attr("orient", "auto")
.attr("class", "arrow")
.append("svg:path")
.attr("d", "M0,-5L10,0L0,5");
var json = dataset;
var edges = [];
json.edges.forEach(function(e) {
var sourceNode = json.nodes.filter(function(n) {
return n.id === e.from;
})[0],
targetNode = json.nodes.filter(function(n) {
return n.id === e.to;
})[0];
edges.push({
source: sourceNode,
target: targetNode,
value: e.Value
});
});
for (var i = 0; i < json.nodes.length; i++) {
json.nodes[i].collapsing = 0;
json.nodes[i].collapsed = false;
}
var link = svg.selectAll(".link");
var node = svg.selectAll(".node");
force.on("tick", function() {
// make sure the nodes do not overlap the arrows
link.attr("d", function(d) {
// Total difference in x and y from source to target
diffX = d.target.x - d.source.x;
diffY = d.target.y - d.source.y;
// Length of path from center of source node to center of target node
pathLength = Math.sqrt((diffX * diffX) + (diffY * diffY));
// x and y distances from center to outside edge of target node
offsetX = (diffX * d.target.radius) / pathLength;
offsetY = (diffY * d.target.radius) / pathLength;
return "M" + d.source.x + "," + d.source.y + "L" + (d.target.x - offsetX) + "," + (d.target.y - offsetY);
});
node.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
});
});
update();
function update() {
var nodes = json.nodes.filter(function(d) {
return d.collapsing == 0;
});
var links = edges.filter(function(d) {
return d.source.collapsing == 0 && d.target.collapsing == 0;
});
force
.nodes(nodes)
.links(links)
.start();
link = link.data(links)
link.exit().remove();
link.enter().append("path")
.attr("class", "link")
.attr("marker-end", "url(#end)");
node = node.data(nodes);
node.exit().remove();
node.enter().append("g")
.attr("class", function(d) {
return "node " + d.type
});
node.append("circle")
.attr("class", "circle")
.attr("r", function(d) {
d.radius = 20;
return d.radius
}); // return a radius for path to use
node.append("text")
.attr("x", 0)
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.attr("class", "text")
.text(function(d) {
return d.type
});
// On node hover, examine the links to see if their
// source or target properties match the hovered node.
node.on('mouseover', function(d) {
link.attr('class', function(l) {
if (d === l.source || d === l.target)
return "link active";
else
return "link inactive";
});
});
// Set the stroke width back to normal when mouse leaves the node.
node.on('mouseout', function() {
link.attr('class', "link");
})
.on('click', click);
function click(d) {
if (!d3.event.defaultPrevented) {
var inc = d.collapsed ? -1 : 1;
recurse(d);
function recurse(sourceNode) {
//check if link is from this node, and if so, collapse
edges.forEach(function(l) {
if (l.source.id === sourceNode.id) {
l.target.collapsing += inc;
recurse(l.target);
}
});
}
d.collapsed = !d.collapsed;
}
update();
}
}.node {
cursor: pointer;
font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
font-weight: 300;
}
.node .text {
fill: white;
font-size: 8px;
}
.ORG .circle {
fill: #1d3649;
}
.EMR .circle {
fill: #B2D0F5;
stroke: #5596e6;
stroke-dasharray: 3px, 3px;
opacity: .5;
}
.EMR .circle:hover {
fill: #5596e6;
}
.link {
fill: none;
stroke: #eee;
stroke-width: 1.5px;
font: 10px sans-serif;
}
.link.active {
stroke: #ddd;
stroke-width: 2;
}
.arrow {
fill: #666;
}
.arrow.active {
stroke-width: 0 !important;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<body></body>