如何解决在节点组周围画一个圆圈
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();
}")
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