我正在d3.json中制作可折叠的树状图。我正在Mike Bostock https://bl.ocks.org/mbostock/4339083的示例中进行工作。我想在此图表上添加链接描述。在此I want to add text on the link in D3.js tree graph的帮助下,我添加了链接描述。但是,当节点和链接由于折叠/展开而移动时,我添加的链接描述不会转换。
如何添加过渡到链接描述文本?
我现有的代码在
下方
var margin = {top: 20, right: 120, bottom: 20, left: 120},
width = 960 - margin.right - margin.left,
height = 800 - margin.top - margin.bottom;
var i = 0,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var flare = {"name": "node1", "children": [{"name": "node2", "children": [{"name": "node3", "children": [{"name": "node4", "children": [{"name": "node5"}, {"name": "node5"}, {"name": "node6"}, {"name": "node7"}]}, {"name": "node8"}]}, {"name": "node9", "children": [{"name": "node10"}, {"name": "node11"}]}, {"name": "node12", "children": [{"name": "node13"}]}, {"name": "node14"}, {"name": "node15"}, {"name": "node16"}, {"name": "node17"}]}, {"name": "node18"}, {"name": "node18"}, {"name": "node19"}]};
root = flare;
root.x0 = height / 2;
root.y0 = 0;
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
root.children.forEach(collapse);
update(root);
d3.select(self.frameElement).style("height", "800px");
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) { d.y = d.depth * 180; });
// Update the nodes�
var node = svg.selectAll("g.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });
// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
.on("click", click);
nodeEnter.append("circle")
.attr("r", 1e-6)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
nodeEnter.append("text")
.attr("x", function(d) { return d.children || d._children ? -10 : 10; })
.attr("dy", ".35em")
.attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
.text(function(d) { return d.name; })
.style("fill-opacity", 1e-6);
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });
nodeUpdate.select("circle")
.attr("r", 4.5)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links�
var link = svg.selectAll("path.link")
.data(links, function(d) { return d.target.id; });
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x0, y: source.y0};
return diagonal({source: o, target: o});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();
var linkg = link.enter();
//add text attribute to link
linkg.append("text")
.attr("font-family", "Arial, Helvetica, sans-serif")
.attr("fill", "Black")
.style("font", "normal 12px Arial")
.attr("transform", function(d) {
return "translate(" +
((d.source.y + d.target.y)/2) + "," +
((d.source.x + d.target.x)/2) + ")";
})
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.text(function(d){return "link"});
link.transition()
.select("text")
.duration(duration)
.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });
link.exit().transition()
.duration(duration)
.select("text")
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
.node {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 1.5px;
}
.node text {
font: 10px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
<script src="http://d3js.org/d3.v3.min.js"></script>
答案 0 :(得分:0)
我使用以下代码添加了链接文本和动画
svg.selectAll("text#link").remove();
links.forEach(function(d){
yy = (d.source.y + d.target.y)/2;
xx = (d.source.x + d.target.x)/2;
svg.append("text")
.attr("font-family", "Arial, Helvetica, sans-serif")
.attr("fill", "Black")
.attr ("id", "link")
.style("font", "normal 12px Arial")
.attr("transform", function(d) {
return "translate(" +
yy + "," +
xx + ")";
})
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.text("link")});