使用dagre-d3制作流程图
dagre-d3插件github地址:https://github.com/dagrejs/dagre-d3
简易版github网址: https://github.com/xuhuihui/svg/tree/master/demo/demo2
csdn引入:
<script src="https://d3js.org/d3.v4.min.js" charset="utf-8"></script>
<script src="../dist/dagre-d3.js"></script>
index.html
<svg id="svg-canvas" width=960 height=900></svg>
index.js
1.声明数组state(点)和edg(边)
var state = [
{ label: 'project_etl_start\n虚节点', class: 'type-suss' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' },
{ label: 'project_etl_start\n虚节点', class: 'type-TOP' }
]
var edg = [
{ start: 1, end: 4, option: {} },
{ start: 1, end: 3, option: {} },
{ start: 1, end: 2, option: {} },
{ start: 6, end: 7, option: {} },
{ start: 5, end: 6, option: {} },
{ start: 9, end: 10, option: {} },
{ start: 8, end: 9, option: {} },
{ start: 11, end: 12, option: {} },
{ start: 8, end: 11, option: {} },
{ start: 5, end: 8, option: {} },
{ start: 1, end: 5, option: {} },
{ start: 13, end: 14, option: {} },
{ start: 1, end: 13, option: {} },
{ start: 0, end: 1, option: {} }
]
2.创建对象graph。
var g = new dagreD3.graphlib.Graph()
.setGraph({})
.setDefaultEdgeLabel(function () { return {}; });
3.声明并添加树节点和边。
for (let i in state) { //画点
let el = state[i]
g.setNode(i, {
id: i,
label: el.label,
class: el.class
});
}
for (let i in edg) { // 画连线
let el = edg[i]
g.setEdge(el.start, el.end, {
style: "stroke: #0fb2cc; fill: none;",
arrowheadStyle: "fill: #0fb2cc;stroke: #0fb2cc;",
arrowhead: 'vee'
});
}
4.渲染dag图。
var render = new dagreD3.render();
var svg = d3.select("#svgCanvas"); //声明节点
svg.select("g").remove(); //删除以前的节点,清空画面
var svgGroup = svg.append("g");
var inner = svg.select("g");
var zoom = d3.zoom().on("zoom", function () { //添加鼠标滚轮放大缩小事件
inner.attr("transform", d3.event.transform);
});
svg.call(zoom);
this.drawNode();//画点
this.drawEdg();// 画连线
render(d3.select("svg g"), this.g); //渲染节点
let max = svg._groups[0][0].clientWidth>svg._groups[0][0].clientHeight?svg._groups[0][0].clientWidth:svg._groups[0][0].clientHeight;
var initialScale = max/779; //initialScale元素放大倍数,随着父元素宽高发生变化时改变初始渲染大小
var tWidth = (svg._groups[0][0].clientWidth - this.g.graph().width * initialScale) / 2; //水平居中
var tHeight = (svg._groups[0][0].clientHeight - this.g.graph().height * initialScale) / 2; //垂直居中
svg.call(zoom.transform, d3.zoomIdentity.translate(tWidth, tHeight).scale(initialScale)); //元素水平垂直居中
5.添加鼠标右键事件,样式如图:
//主要代码如下:
var svgCanvas = document.getElementById('svg-canvas'); //svg
var myMenu = document.getElementById("myMenu"); //右键菜单
svgCanvas.addEventListener('mouseover', function (e) {//监听鼠标右键
e.preventDefault();
if (e.target.tagName === 'rect') {
myMenu.style.top = event.clientY + "px"; //获取鼠标位置
myMenu.style.left = event.clientX + "px";
myMenu.style.display = 'block'; //显示相应右键内容
}
})
document.addEventListener("click", (event) => {
myMenu.style.display = 'none';
});
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作者:长是人千离
来源:CSDN
原文:https://blog.csdn.net/qq_30227429/article/details/79878660
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