参考网上的例子 从新实现了下轮状树图:
<script type="text/javascript" src="src/lib/d3.min.js"></script>
<script type="text/javascript" src="src/lib/d3.layout.js"></script>
核心代码:
export default{
//初始化轮状图
initlun:function(classpath,data){
var width = document.body.clientWidth;
var height = document.body.clientHeight-65;
//图像区域大小
var R = 600;
//动画持续时间
var duration=1000;
//节点编号
var index=0;
//定义一个Tree对象,定义旋转角度和最大半径
var tree = d3.layout.tree()
.size([360,R/2-120])
.separation(function(a,b) { return (a.parent == b.parent ? 1 : 2)/a.depth;});
//定义布局方向
var diagonal = d3.svg.diagonal()
.projection(function(d) {
var r = d.y, a = (d.x-90) / 180 * Math.PI;
return [r * Math.cos(a), r * Math.sin(a)];
});
//新建画布,移动到圆心位置
var svg = d3.select(classpath).append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", function(d){ return "translate("+R/2+"," + R/2 + ")";});
//根据JSON数据生成树
/* d3.json("treeDataC.php", function(error, data) {*/
var root=data;
//根据数据生成nodes集合
var nodes = tree.nodes(data);
//记录现在的位置
nodes.forEach(function(d){
d.x0 = d.x;
d.y0 = d.y;
});
//获取node集合的关系集合
var links = tree.links(nodes);
//根据node集合生成节点,添加id是为了区分是否冗余的节点
var node = svg.selectAll(".node")
.data(nodes,function(d){return d.id|| (d.id = ++index);});
//为关系集合设置贝塞尔曲线连接
var link=svg.selectAll(".link")
.data(links, function(d) { return d.target.id;})
.enter()
.append("path")
.attr("class", "link")
.attr("d",diagonal);
node.enter()
.append("g")
.attr("class", "node")
.attr("transform",function(d){return "rotate(" + (d.x-90) + ")translate(" + d.y + ")"; })
.on("click",nodeClick);
//为节点添加圆形标记,如果有子节点为红色,否则绿色
node.append("circle")
.attr("fill",function(d){return d.children==null?"#0F0":"#F00";})
.attr("r", 5);
//为节点添加说明文字
node.append("text")
.attr("dy", ".4em")
.text(function(d){return d.level;})
.attr("text-anchor", function(d) { return d.x < 180 ? "start" : "end"; })
.attr("transform", function(d) { return d.x < 180 ? "translate(8)" : "rotate(180)translate(-8)"; });
//点击的话,隐藏或者显示子节点
function nodeClick(d)
{
if (d.children)
{
d._children = d.children;
d.children = null;
}
else
{
d.children = d._children;
d._children = null;
}
update(d);
}
//更新显示
function update(source)
{
//取得现有的节点数据,因为设置了Children属性,没有Children的节点将被删除
var nodes = tree.nodes(root).reverse();
var links = tree.links(nodes);
//为节点更新数据
var node = svg.selectAll("g.node")
.data(nodes,function(d){return d.id|| (d.id = ++index);});
//为链接更新数据
var link = svg.selectAll("path.link").data(links, function(d) {return d.target.id;});
//更新链接
link.enter()
.append("path")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
});
link.transition()
.duration(duration)
.attr("d",diagonal);
//移除无用的链接
link.exit()
.transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();
//更新节点集合
var nodeEnter = node.enter()
.append("g")
.attr("class", "node")
.attr("transform",function(d){return "rotate(" + (source.x0-90) + ")translate(" + source.y0 + ")"; })
.on("click",nodeClick);
//为节点添加圆形标记,如果有子节点为红色,否则绿色
node.append("circle")
.attr("fill",function(d){return d.children==null && d._children==null?"#0F0":"#F00";})
.attr("r", 5);
//为节点添加说明文字
node.append("text")
.attr("dy", ".4em")
.text(function(d){return d.level;})
.attr("text-anchor", function(d) { return d.x < 180 ? "start" : "end"; })
.attr("transform", function(d) { return d.x < 180 ? "translate(8)" : "rotate(180)translate(-8)"; });
//节点动画
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) { return "rotate(" + (d.x-90) + ")translate(" + d.y + ")"; });
//将无用的子节点删除
var nodeExit =node.exit()
.transition()
.duration(duration)
.attr("transform", function(d){return "rotate(" + (source.x-90) + ")translate(" + source.y + ")"; })
.remove();
//记录下当前位置,为下次动画记录初始值
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
/*});*/
}
}
数据结构:
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