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Sprint","id":237884,"score":86},{"brand":"Samsung Digital Imaging","id":263317,"score":85},{"brand":"Time Warner","id":266908,"score":84},{"brand":"Microsoft Tag","id":277494,"score":84},{"brand":"Samsung Televisions","id":288921,"score":79},{"brand":"Microsoft Visual Studio","id":234168,"score":72},{"brand":"NBC Olympics","id":266564,"score":71},{"brand":"Samsung Mobile USA","id":294087,"score":71},{"brand":"Sony Electronics","id":263313,"score":66},{"brand":"Samsung USA","id":263316,"score":65},{"brand":"Samsung Service","id":288922,"score":63},{"brand":"LG USA Mobile","id":289167,"score":61},{"brand":"Sony PlayStation","id":236075,"score":60},{"brand":"LG Electronics USA","id":288915,"score":58},{"brand":"Microsoft Publisher","id":277505,"score":57},{"brand":"NBC","id":266563,"score":57},{"brand":"Microsoft Office","id":234169,"score":56},{"brand":"Samsung Galaxy Tab","id":294086,"score":56},{"brand":"Microsoft PowerPoint","id":277497,"score":54},{"brand":"Time Warner Cable","id":266909,"score":50},{"brand":"Samsung Notebook","id":289021,"score":48},{"brand":"Dell Spot","id":236265,"score":47},{"brand":"Microsoft Web Platform","id":277504,"score":46},{"brand":"Canon","id":299953,"score":45},{"brand":"Samsung Apps","id":289022,"score":44},{"brand":"Dell Go Green","id":236267,"score":36},{"brand":"Samsung Galaxy S","id":294883,"score":32},{"brand":"Microsoft Access","id":277500,"score":32},{"brand":"Microsoft Visio","id":277498,"score":26},{"brand":"Microsoft Excel","id":277506,"score":25},{"brand":"BlackBerry for AT&T","id":237824,"score":24},{"brand":"IBM Research","id":292838,"score":23},{"brand":"LG-Ericsson USA","id":288916,"score":20},{"brand":"Sony","id":263312,"score":20},{"brand":"Microsoft Word","id":277496,"score":17},{"brand":"Microsoft Learning","id":277503,"score":14},{"brand":"Microsoft Windows Server","id":277501,"score":11},{"brand":"Microsoft Lync","id":277502,"score":11},{"brand":"Dell Deals","id":236268,"score":7},{"brand":"HP","id":292840,"score":2},{"brand":"Dell Outlet","id":236270,"score":0}]}]};
var tree = json.sectors;
var ids = json.ids;
arr=[];
sRank={};
function active(d, v) {
d.active = v;
if (d.parentNode) {
active(d.parentNode, v);
}
}
// used for alpha
sRank={};
for(var i in json.eranks)
{
var sector = json.eranks[i].sector;
sRank[sector]=[];
for(var p in json.eranks[i].pages){
sRank[sector].push(json.eranks[i].pages[p].brand)
}
}
var nodes = pv.dom(tree).root("tree").nodes();
color = pv.Colors.category20().by(function (d) { return d.parentNode.nodeName });
var vis = new pv.Panel()
.width(660)
.height(900);
var treemap = vis.add(pv.Layout.Treemap)
.nodes(nodes);
treemap.leaf.add(pv.Panel)
.fillStyle(function (d) { return color(d).alpha(1-sRank[d.parentNode.nodeName].indexOf(d.nodeName)/sRank[d.parentNode.nodeName].length) })
.strokeStyle("#fff")
.lineWidth(1)
.antialias(false)
.cursor("pointer")
.title(function(d) { return d.nodeName})
.event("click", function (d) {alert(d.parentNode.nodeName); });
treemap.leaf.add(pv.Label)
.font("20px sans-serif")
.textBaseline("bottom")
.text(function(d) { middle=Math.round(sRank[d.parentNode.nodeName].length/2)-1;
if(sRank[d.parentNode.nodeName].indexOf(d.nodeName) == middle)
{return d.parentNode.nodeName}}
);
vis.render();
这里最好的选择是使用treemap.label，它为每个节点自动居中。默认情况下，treemap.label的.visible属性设置如下:
.visible(function(n) { return !n.firstChild; })
只显示叶节点的标签。然而，你可以设置.visible属性自己一旦你添加了一个树状图，并将其更改为只显示父节点(你必须确保他们有一个父节点，或者你得到一个额外的，不需要的标签的根节点):
treemap.label
.visible(function(d) { return d.firstChild && d.parentNode });
在您的示例中，您可以将其链接到您的标签，因此完整的代码片段看起来像:
treemap.label
.visible(function(d) { return d.firstChild && d.parentNode })
.add(pv.Label)
.font("20px sans-serif")
.textBaseline("bottom")
.text(function(d) {
return d.nodeName
});
工作jsFiddle在这里:http://jsfiddle.net/nrabinowitz/T3fnT/1/