我想让文本包装在以下D3树上,而不是
Foo is not a long word
每条线都被包裹起来
Foo is not a long word
我已经尝试使文本为“foreignObject”而不是文本对象,文本确实包含,但它不会在树动画上移动,并且都分组在左上角.
代码位于
http://jsfiddle.net/mikeyai/X43X5/1/
使用Javascript：
var width = 960,height = 500;
var tree = d3.layout.tree()
.size([width - 20,height - 20]);
var root = {},nodes = tree(root);
root.parent = root;
root.px = root.x;
root.py = root.y;
var diagonal = d3.svg.diagonal();
var svg = d3.select("body").append("svg")
.attr("width",width)
.attr("height",height)
.append("g")
.attr("transform","translate(10,10)");
var node = svg.selectAll(".node"),link = svg.selectAll(".link");
var duration = 750,timer = setInterval(update,duration);
function update() {
if (nodes.length >= 500) return clearInterval(timer);
// Add a new node to a random parent.
var n = {id: nodes.length},p = nodes[Math.random() * nodes.length | 0];
if (p.children) p.children.push(n); else p.children = [n];
nodes.push(n);
// Recompute the layout and data join.
node = node.data(tree.nodes(root),function(d) { return d.id; });
link = link.data(tree.links(nodes),function(d) { return d.source.id + "-" + d.target.id; });
// Add entering nodes in the parent’s old position.
node.enter().append("text")
.attr("class","node")
.attr("x",function(d) { return d.parent.px; })
.attr("y",function(d) { return d.parent.py; })
.text('Foo is not a long word');
// Add entering links in the parent’s old position.
link.enter().insert("path",".node")
.attr("class","link")
.attr("d",function(d) {
var o = {x: d.source.px,y: d.source.py};
return diagonal({source: o,target: o});
});
// Transition nodes and links to their new positions.
var t = svg.transition()
.duration(duration);
t.selectAll(".link")
.attr("d",diagonal);
t.selectAll(".node")
.attr("x",function(d) { return d.px = d.x; })
.attr("y",function(d) { return d.py = d.y; });
}
解决方法
您可以修改
Mike Bostock’s “Wrapping Long Labels” example以添加< tspan>元素到您的< text>节点.将包装文本添加到您的节点需要两个主要更改.我没有深入了解文本在过渡期间更新其位置,但不应该太难添加.
第一个是在上面的例子中添加一个基于函数的函数换行符. wrap将负责添加< tspan>元素使您的文字适合一定宽度：
function wrap(text,width) {
text.each(function () {
var text = d3.select(this),words = "Foo is not a long word".split(/\s+/).reverse(),word,line = [],lineNumber = 0,lineHeight = 1.1,// ems
x = text.attr("x"),y = text.attr("y"),dy = 0,//parseFloat(text.attr("dy")),tspan = text.text(null)
.append("tspan")
.attr("x",x)
.attr("y",y)
.attr("dy",dy + "em");
while (word = words.pop()) {
line.push(word);
tspan.text(line.join(" "));
if (tspan.node().getComputedTextLength() > width) {
line.pop();
tspan.text(line.join(" "));
line = [word];
tspan = text.append("tspan")
.attr("x",x)
.attr("y",y)
.attr("dy",++lineNumber * lineHeight + dy + "em")
.text(word);
}
}
});
}
第二个变化是,不需要设置每个节点的文本,您需要为每个节点调用换行符：
// Add entering nodes in the parent’s old position.
node.enter().append("text")
.attr("class","node")
.attr("x",function (d) { return d.parent.px; })
.attr("y",function (d) { return d.parent.py; })
.call(wrap,30); // wrap the text in <= 30 pixels
