D3.js学习笔记十五:D3.js树图(Tree)展开和折叠
来源:互联网 发布:海康监控软件 编辑:程序博客网 时间:2024/06/09 17:12
构图(d3.layout)——树图(Tree)的展开和折叠
树的基本操作就是展开和折叠,在D3里面,树的展开和折叠是通过设置树的子节点属性来实现的,tree.nodes(root)返回树的当前节点集合,通过操作这个集合,可以实现节点的动态变化。
- children - the array of child nodes, or null for leaf nodes.
- x - the computed x-coordinate of the node position.
- y - the computed y-coordinate of the node position.
取得节点集合可用如下代码:
var nodes = tree.nodes(root).reverse(); var links = tree.links(nodes);
为了能够区分节点是新加入的还是冗余的,我们为节点数据集指定id属性,然后我们就可以通过这个属性,使用.exit()来获取冗余节点:
var node = svg.selectAll("g.node") .data(nodes,function(d){return d.id|| (d.id = ++index);});
为了能够保证动画的流畅,我们需要记录节点的当前位置,当节点数目变化,产生新的坐标以后,我们使用当前位置过渡到新的位置:
nodes.forEach(function(d) { d.x0 = d.x; d.y0 = d.y; });
树的展开和折叠代码如下:
< script type = "text/javascript" >//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;
//动画时长
var duration = 1000;//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("body").append("svg")
.attr("width", R)
.attr("height", R)
.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;
});
}
}); < /script>
{"name":"\u6839\u8282\u70b9","children":[{"name":"\u8282\u70b9(3)","children":[{"name":"\u8282\u70b9(4)","children":[{"name":"\u53f6\u5b501","size":863},{"name":"\u53f6\u5b502","size":80},{"name":"\u53f6\u5b503","size":740},{"name":"\u53f6\u5b504","size":688}]},{"name":"\u8282\u70b9(2)","children":[{"name":"\u53f6\u5b505","size":110},{"name":"\u53f6\u5b506","size":102}]},{"name":"\u8282\u70b9(2)","children":[{"name":"\u53f6\u5b507","size":249},{"name":"\u53f6\u5b508","size":540}]}]},{"name":"\u8282\u70b9(5)","children":[{"name":"\u53f6\u5b509","size":451},{"name":"\u53f6\u5b5010","size":453},{"name":"\u53f6\u5b5011","size":256},{"name":"\u8282\u70b9(3)","children":[{"name":"\u53f6\u5b5012","size":476},{"name":"\u53f6\u5b5013","size":678},{"name":"\u53f6\u5b5014","size":954}]},{"name":"\u8282\u70b9(1)","children":[{"name":"\u53f6\u5b5015","size":608}]}]},{"name":"\u8282\u70b9(5)","children":[{"name":"\u8282\u70b9(4)","children":[{"name":"\u53f6\u5b5016","size":770},{"name":"\u53f6\u5b5017","size":985},{"name":"\u53f6\u5b5018","size":106},{"name":"\u53f6\u5b5019","size":89}]},{"name":"\u8282\u70b9(3)","children":[{"name":"\u53f6\u5b5020","size":917},{"name":"\u53f6\u5b5021","size":754},{"name":"\u53f6\u5b5022","size":271}]},{"name":"\u8282\u70b9(1)","children":[{"name":"\u53f6\u5b5023","size":226}]},{"name":"\u8282\u70b9(3)","children":[{"name":"\u53f6\u5b5024","size":195},{"name":"\u53f6\u5b5025","size":862},{"name":"\u53f6\u5b5026","size":730}]},{"name":"\u8282\u70b9(5)","children":[{"name":"\u53f6\u5b5027","size":969},{"name":"\u53f6\u5b5028","size":871},{"name":"\u53f6\u5b5029","size":225},{"name":"\u53f6\u5b5030","size":721},{"name":"\u53f6\u5b5031","size":97}]}]},{"name":"\u8282\u70b9(6)","children":[{"name":"\u8282\u70b9(3)","children":[{"name":"\u53f6\u5b5032","size":434},{"name":"\u53f6\u5b5033","size":646},{"name":"\u53f6\u5b5034","size":614}]},{"name":"\u8282\u70b9(5)","children":[{"name":"\u53f6\u5b5035","size":330},{"name":"\u53f6\u5b5036","size":155},{"name":"\u53f6\u5b5037","size":782},{"name":"\u53f6\u5b5038","size":736},{"name":"\u53f6\u5b5039","size":177}]},{"name":"\u53f6\u5b5040","size":662},{"name":"\u8282\u70b9(3)","children":[{"name":"\u53f6\u5b5041","size":110},{"name":"\u53f6\u5b5042","size":540},{"name":"\u53f6\u5b5043","size":124}]},{"name":"\u8282\u70b9(5)","children":[{"name":"\u53f6\u5b5044","size":284},{"name":"\u53f6\u5b5045","size":487},{"name":"\u53f6\u5b5046","size":385},{"name":"\u53f6\u5b5047","size":346},{"name":"\u53f6\u5b5048","size":945}]},{"name":"\u8282\u70b9(2)","children":[{"name":"\u53f6\u5b5049","size":270},{"name":"\u53f6\u5b5050","size":88}]}]},{"name":"\u8282\u70b9(6)","children":[{"name":"\u8282\u70b9(5)","children":[{"name":"\u53f6\u5b5051","size":502},{"name":"\u53f6\u5b5052","size":466},{"name":"\u53f6\u5b5053","size":550},{"name":"\u53f6\u5b5054","size":661},{"name":"\u53f6\u5b5055","size":558}]},{"name":"\u8282\u70b9(1)","children":[{"name":"\u53f6\u5b5056","size":314}]},{"name":"\u8282\u70b9(2)","children":[{"name":"\u53f6\u5b5057","size":742},{"name":"\u53f6\u5b5058","size":340}]},{"name":"\u8282\u70b9(5)","children":[{"name":"\u53f6\u5b5059","size":949},{"name":"\u53f6\u5b5060","size":99},{"name":"\u53f6\u5b5061","size":305},{"name":"\u53f6\u5b5062","size":684},{"name":"\u53f6\u5b5063","size":90}]},{"name":"\u8282\u70b9(6)","children":[{"name":"\u53f6\u5b5064","size":732},{"name":"\u53f6\u5b5065","size":980},{"name":"\u53f6\u5b5066","size":758},{"name":"\u53f6\u5b5067","size":359},{"name":"\u53f6\u5b5068","size":166},{"name":"\u53f6\u5b5069","size":413}]},{"name":"\u53f6\u5b5070","size":946}]}]}
- D3.js学习笔记十五:D3.js树图(Tree)展开和折叠
- D3.js 学习笔记
- d3.js 学习笔记
- d3.js学习笔记
- d3.js学习笔记 -- 尺度
- D3.js学习笔记(1)
- D3.js--Tree(树)
- d3.js tree
- D3.js 数据可视化学习笔记——Hello D3!
- D3.js学习笔记十二:D3.js构图(d3.layout)——力学(Force)图
- d3.js 参考笔记
- D3.js 学习
- D3.js学习总结
- D3.js学习
- D3 js学习资料
- D3.js学习总结
- d3.js学习
- d3.js入门学习
- python 文件头的编码声明问题
- HDU 1711 Number Sequence (KMP模板)
- JS当中的拷贝!!!
- Oracle学习日志
- 欢迎使用CSDN-markdown编辑器
- D3.js学习笔记十五:D3.js树图(Tree)展开和折叠
- 二进制 与十进制 互相转换
- 国家代码
- 测试代码运行后不报错,数据库也会生成表,但控制台不能输出。哪位大神能帮我解决?
- composer 安装yii2框架
- 504. Base 7
- 关于ASP.NET 发送电子邮件
- 原型模式
- 剑指offer——反转链表