在节点组周围画一个圆圈

问题描述

在以下可见网络中，我有 2 组节点。通过在生成 layput_as_tree 后访问节点位置，我已将 2 组节点分为左侧和右侧。现在想在节点组周围画一个圆或椭圆。 这是一个可重现的例子

require(shiny)
require(visNetwork)
server <- function(input,output) {
  output$network <- visNetwork::renderVisNetwork({
    edges <- data.frame(
      from = sample(1:10,8),to = sample(1:10,label = paste("interaction type",1:8),length = c(100,500),width = c(4,1),arrows = c("to","from","middle","middle;to"),dashes = c(TRUE,FALSE),title = paste("interaction name",smooth = c(FALSE,TRUE),shadow = c(FALSE,TRUE,FALSE,TRUE)
    )
    nodes <- data.frame(
      id = 1:10,group = c("A","B"),label = paste("Node",1:10),shape = "ellipse"
    )

    # save the graph in variable
    g <-
      visNetwork::visNetwork(nodes,edges,height = "500px",width = "100%") %>% 
      visNetwork::visIgraphLayout(layout = "layout_as_tree")

    # access the x and y co-ordinates to arrange the groups
    coords <- g$x$nodes %>%
      dplyr::mutate(x = abs(x)) %>%
      dplyr::mutate(y = abs(y)) %>%
      dplyr::mutate(x = ifelse(group %in% "A",-x,x)) %>%
      dplyr::select(x,y) %>%
      as.matrix()

    #' replot the network with the new co-ordinates
    visNetwork::visNetwork(nodes,width = "100%") %>%
     visNetwork::visIgraphLayout(
      layout = "layout.norm",layoutMatrix = coords,randomSeed = 1,smooth = T
    ) 
  })
}

ui <- shiny::fluidPage(
  visNetwork::visNetworkOutput("network",width = "1000px",height = "700px"
  )
)

shiny::shinyApp(ui = ui,server = server)

解决方法

我正在完成剧本，但我必须离开......会回来完成。

res.status(500).send({ error: "That type already exists." })

//The nodeGraph variable should probably be ran through a transitive
//closure algorithm to simiplify it,so its not an overly complicated
//network
nodeGraph = {};


//create nodes and the beginnings of a dictionary for a directed graph
//to later be used to adjust the positions of nodes - note this is not
//the most efficient algorithm.

nodeCount = 10;

for (var i = 0; i < nodeCount; i++)
{
  var div = document.createElement('div');
  div.id = "node" + i;
  div.className = "node";
  div.setAttribute("group",(randomInt(1,2) == 1) ? "A" : "B")
  nodeGraph["node" + i] = [];
  document.getElementsByClassName('container')[0].append(div);
}

//here I randomly create a relationship amongst nodes - but I limit it to 5 relationships just so its not too resource heavy.

//loop through each node
for (var i = 0; i < nodeCount; i++)
{
  //generate number of relationships
  randInt = randomInt(1,5);
  
  //generate random relationships
  for (var j = 0; j < randInt; j++)
  {
    ranNum = randomInt(0,nodeCount - 1);
    //console.log(ranNum);
    while (nodeGraph["node" + i].includes(ranNum))
    {
      ranNum = randomInt(0,nodeCount - 1);
    }
    //console.log(ranNum);
    nodeGraph["node" + i].push("node" + ranNum);
  }
}

//outputs the random relationship amongst nodes
console.log(nodeGraph);

//the above code sets up the problem for what we want to achieve
//which is to essentially sort the nodes into the two "cells"

//lets get the location of the parent cells and a reference to them
groupABox = document.getElementById('GroupA');
groupABBox = groupABox.getBoundingClientRect();
groupBBox = document.getElementById('GroupB');
groupBBBox = groupBBox.getBoundingClientRect();
//then loop through every node and stick them into their respective groups
for (var i = 0; i < nodeCount; i++)
{
  currentNode = document.getElementById("node" + i);
  group = currentNode.getAttribute('group');
  if (group == 'A')
  {
    relationships = nodeGraph['node' + i];
    for (var j = 0; j < relationships.length; j++)
    {
      comparedNode = document.getElementById(relationships[j]);
      if (comparedNode.getAttribute('group') == 'A')
      {
      }
      else
      {
      }
    }
  }
}

function randomInt(min,max)
{ 
  return Math.floor(Math.random() * (max - min + 1) + min);
}

.parentNode
{
  border-radius: 100px;
  border: solid black 5px;
  height: 500px;
  width: 200px;
  position: relative;
  background-color: lightblue;
}

#GroupA
{
  float: left;
}

#GroupB
{
  float: right;
}

.node
{
  height: 20px;
  width: 20px;
  position: absolute;
  float: none;
  background-color: green;
}

https://jsfiddle.net/Shmac/x1wf52ba/1/

,

使用 visEvents 并传递 Javascript 代码能够生成围绕节点组的圆圈。

graph %>%
    visNetwork::visEvents(type = "on",beforeDrawing = "function(ctx) {
    ctx.fillStyle = 'rgba(255,255,0.1)';
    ctx.ellipse(-180,25,150,280,2 * Math.PI);
    ctx.fill();
    ctx.fillStyle = 'rgba(64,0.1)';
    ctx.ellipse(180,2 * Math.PI);
    ctx.fill();
}")