【发布时间】：2014-04-16 01:13:27
【问题描述】：
我已经使用http://bl.ocks.org/mbostock/4339083在一个页面中实现了多个可折叠树
但是我遇到了点击事件的问题。当我单击一个节点时，它不会折叠或展开。可折叠事件仅适用于最后一棵树（问题树），因为它是最后加载的 svg。 （例如：http://tinypic.com/r/2zzqcn5/8）
如何让点击事件适用于所有树？为每个图使用 iframe 会解决这个问题吗？如果可以怎么办？
谢谢。
collapse_graph(type) 的每个函数调用的 JSON 数据：
第一次迭代：type = Artifacts
{"name":"artifacts","children":[
{"name":"weights","children":[]},
{"name":"sampling compartment","children":[]},
{"name":"depth guage","children":[
{"name":"Decomp8","children":[
{"name":"Pressure gauge","children":[]}]},
{"name":"Decomp9","children":[
{"name":"a sensor that determines the depth","children":[]}
]}
]}
]}
第二次迭代：type = Behaviour
{"name":"behaviors","children":[
{"name":"Hydrostatic pressure","children":[
{"name":"Decomp6","children":[
{"name":"Ro","children":[]},
{"name":"h","children":[]},
{"name":"g","children":[]}
]}
]}
]}
第三次迭代：类型 = 问题
{"name":"issues","children":[
{"name":"withstanding pressure in depth","children":[]}
]}
代码：
/* Collapsible Tree Global variables */
var tree, diagonal, svg;
var inc = 0, duration = 750, root;
$('#tabs').append("<h2>Artifacts</h2>");
collapse_graph('artifact');
$('#tabs').append("<h2>Behaviors</h2>");
collapse_graph('behavior');
$('#tabs').append("<h2>Issues</h2>");
collapse_graph('issue');
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
function collapse_graph(type){
var data = {};
//data['name'] = type + "s";
//data['children'] = getChildrenEntities(type);
if(type == 'artifact') {
data = JSON.parse('{"name":"artifacts","children":[{"name":"weights","children":[]},{"name":"sampling compartment","children":[]},{"name":"depth guage","children":[{"name":"Decomp8","children":[{"name":"Pressure gauge","children":[]}]},{"name":"Decomp9","children":[{"name":"a sensor that determines the depth","children":[]}]}]}]}');
}
if (type == 'behavior') {
data = JSON.parse('{"name":"behaviors","children":[{"name":"Hydrostatic pressure","children":[{"name":"Decomp6","children":[{"name":"Ro","children":[]},{"name":"h","children":[]},{"name":"g","children":[]}]}]}]}');
}
if (type == 'issue') {
data = JSON.parse('{"name":"issues","children":[{"name":"withstanding pressure in depth","children":[]}]}');
}
// d3 business.
var width = 800;
var height = 500;
tree = d3.layout.tree().size([height, width]);
diagonal = d3.svg.diagonal().projection(function(d) { return [d.y, d.x]; });
svg = d3.select("#tabs").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(100,0)");
root = data;
root.x0 = height / 2;
root.y0 = 0;
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 = ++inc); });
// 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();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
inc = 0;
}
// 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);
}
【问题讨论】：
-
所有 3 棵树中的节点是否都连接到同一个侦听器（即
click函数）？ -
嗨@FernOfTheAndes！是的。它调用相同的函数来创建所有图形。
-
没有看到您的代码，我怀疑您的问题可能是您正在为所有本身调用相同更新函数的树调用相同的处理程序...
-
@FernOfTheAndes...我已附上代码供您参考。我如何修改它以适用于所有树木？谢谢
-
缺少一段代码：
getChildrenEntities()函数。请添加该内容以及可能缺少的任何其他部分。
标签： javascript jquery d3.js tree