D3.js实现节点折叠+闪烁+叶节点形状改变的demo

xiaoxiao2021-02-28  131

这个demo主要实现的功能是D3树图节点折叠功能+闪烁+叶节点形状改变功能:

其中,D3.js树图节点的形状已经画好供用户使用的有以下几种:

• circle - a circle. • cross - a Greek cross or plus sign. • diamond - a rhombus. • square - an axis-aligned square. • triangle-down - a downward-pointing equilateral triangle. • triangle-up - an upward-pointing equilateral triangle.


效果图(带颜色节点有闪烁功能):

HTML代码:

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Tree Example</title> <style> .node { cursor: pointer; } .node circle { stroke: '#f0f'; stroke-width: 4px; } .node text { font: 12px sans-serif; } .link { fill: none; stroke: #ccc; stroke-width: 2px; } .fill_normal { fill: green; } .bling{ animation: alarm 0.4s ease-in infinite ; fill:yellow; font-weight: bold;} @keyframes alarm { 0%{ fill:#FF9966;} 50%{ fill:#FF3333;} 100%{ fill:#FF9966;} } </style> </head> <body> <!-- load the d3.js library --> <script src="http://d3js.org/d3.v3.min.js"></script> <script> var treeData = [ { "name": "Top Level", "parent": "null", "value": 10, "children": [ { "name": "Level 2: A", "parent": "Top Level", "value": 10, "children": [ { "name": "Son of A", "parent": "Level 2: A", "value": 5 }, { "name": "Daughter of A", "parent": "Level 2: A", "value": 5 }, ] }, { "name": "Level 2: B", "parent": "Top Level", "value": 5 }, { "name": "Level 2: C", "parent": "Top Level", "value": 5 }, ] } ]; // ************** Generate the tree diagram ***************** //定义树图的全局属性(宽高) var margin = {top: 20, right: 120, bottom: 20, left: 120}, width = 960 - margin.right - margin.left, height = 500 - margin.top - margin.bottom; var i = 0, duration = 750,//过渡延迟时间 root; var tree = d3.layout.tree()//创建一个树布局 .size([height, width]); var diagonal = d3.svg.diagonal() .projection(function(d) { return [d.y, d.x]; });//创建新的斜线生成器 //声明与定义画布属性 var svg = d3.select("body").append("svg") .attr("width", width + margin.right + margin.left) .attr("height", height + margin.top + margin.bottom) .append("g") .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); root = treeData[0];//treeData为上边定义的节点属性 root.x0 = height / 2; root.y0 = 0; update(root); d3.select(self.frameElement).style("height", "500px"); function update(source) { // Compute the new tree layout.计算新树图的布局 var nodes = tree.nodes(root).reverse(), links = tree.links(nodes); // Normalize for fixed-depth.设置y坐标点,每层占180px nodes.forEach(function(d) { d.y = d.depth * 180; }); // Update the nodes…每个node对应一个group var node = svg.selectAll("g.node") .data(nodes, function(d) { return d.id || (d.id = ++i); });//data():绑定一个数组到选择集上,数组的各项值分别与选择集的各元素绑定 // Enter any new nodes at the parent's previous position.新增节点数据集,设置位置 var nodeEnter = node.enter().append("g") //在 svg 中添加一个g,g是 svg 中的一个属性,是 group 的意思,它表示一组什么东西,如一组 lines , rects ,circles 其实坐标轴就是由这些东西构成的。 .attr("class", "node") //attr设置html属性,style设置css属性 .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; }) .on("click", click); //添加连接点---此处设置的是圆圈过渡时候的效果(颜色) // nodeEnter.append("circle") // .attr("r", 1e-6);//d 代表数据,也就是与某元素绑定的数据。 nodeEnter.append("path") .style("stroke-width", "2px") .style("stroke", "#4682b4") .style("fill", "white") .attr("d", d3.svg.symbol() .size(function(d){ if (d.value <= 9) { return "400"; } else if (d.value >= 9) { return "400";} }) .type(function(d) { if (d.value <= 9) { return "triangle-up"; } else if (d.value >= 9) { return "circle";} })) .attr('class',function(d){ if(d.value <= 9 ){ return 'bling'; }else{ return 'fill_normal'; } }); //添加标签 nodeEnter.append("text") .attr("x", function(d) { return d.children || d._children ? -13 : 13; }) .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.将节点过渡到一个新的位置-----主要是针对节点过渡过程中的过渡效果 //node就是保留的数据集,为原来数据的图形添加过渡动画。首先是整个组的位置 var nodeUpdate = node.transition() //开始一个动画过渡 .duration(duration) //过渡延迟时间,此处主要设置的是圆圈节点随斜线的过渡延迟 .attr("r", 10) .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; }); //更新连接点的填充色 // nodeUpdate.select("circle") // .attr("r", 10) // .attr('class',function(d){ // if(d.value <= 9){ // return 'bling'; // }else{ // return 'fill_normal'; // } // }); nodeUpdate.select("path") .style("stroke-width", "2px") .style("stroke", "#4682b4") .style("fill", "white") .attr("d", d3.svg.symbol() .size(function(d){ if (d.value <= 9) { return "400"; } else if (d.value >= 9) { return "400";} }) .type(function(d) { if (d.value <= 9) { return "triangle-up"; } else if (d.value >= 9) { return "circle";} })) .attr('class',function(d){ if(d.value <= 9 ){ return 'bling'; }else{ return 'fill_normal'; } }); nodeUpdate.select("text") .style("fill-opacity", 1); // Transition exiting nodes to the parent's new position.过渡现有的节点到父母的新位置。 //最后处理消失的数据,添加消失动画 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…线操作相关 //再处理连线集合 var link = svg.selectAll("path.link") .data(links, function(d) { return d.target.id; }); // Enter any new links at the parent's previous position. //添加新的连线 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}); //diagonal - 生成一个二维贝塞尔连接器, 用于节点连接图. }) .style("stroke",function(d){ //d包含当前的属性console.log(d) return '#ccc'; }); // Transition links to their new position.将斜线过渡到新的位置 //保留的连线添加过渡动画 link.transition() .duration(duration) .attr("d", diagonal); // Transition exiting nodes to the parent's new position.过渡现有的斜线到父母的新位置。 //消失的连线添加过渡动画 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.将旧的斜线过渡效果隐藏 nodes.forEach(function(d) { d.x0 = d.x; d.y0 = d.y; }); } //定义一个将某节点折叠的函数 // Toggle children on click.切换子节点事件 function click(d) { if (d.children) { d._children = d.children; d.children = null; } else { d.children = d._children; d._children = null; } update(d); } </script> </body> </html>
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