R 动态生成数据树

我正在尝试创建一个动态闪亮页面来利用data.tree包，但在尝试通过操作按钮动态添加子级和同级时遇到了问题。我已经提供了一个例子，但我不能让它正常工作。如果用户可以定义附加到父对象的子对象和兄弟对象的列表，那就太棒了

library(shiny); 
library(data.tree)
library(DiagrammeR)
ui <- fluidPage(
  sidebarLayout(
    sidebarPanel = (
      textInput("parent","parent","parent"),
      actionButton("add_child", "Add Child"),
      actionButton("add_sibling", "Add Sibling")  
    )

  )
  mainPanel(grVizOutput("HTATree")   ),
)

server <- function(input, output){
  output$HTATree=renderGrViz({
    org <- Node$new(input$parent)
    child1 = org$AddChild("Child_1")
    child2 = org$AddChild("Child_2")
    child1$AddSibling("Sibling")
    grViz(DiagrammeR::generate_dot(ToDiagrammeRGraph(org)))
  })

  observeEvent(input$add_child,{
              #add a child under the parent   
               }
               )
  observeEvent(input$add_sibling,{
              #Add sibling
  }
}


shinyApp(ui = ui, server = server) 

库（闪亮）；
库（data.tree）
图书馆（图解机）
ui嗯，这并不漂亮，也不是什么累赘，但它很管用。请注意，为了创建同级节点，您必须首先使用“遍历”选项爬升到该节点，因为您无法在根节点上创建同级节点：

library(shiny) 
library(data.tree)
library(DiagrammeR)
ui <- fluidPage(
  uiOutput("mainpage")
)
server <- function(input, output){
  working <- reactiveValues(org = NULL)
  current <- reactiveValues(ch_name = NULL,prefix  =     NULL,addchild=NULL,addsibling=NULL)
  output$mainpage <- renderUI({
    sidebarLayout(
      sidebarPanel(
        fixedRow(
          textInput("parent","name of parent")
        ),
        fixedRow(
          textInput("initch_name","first child node name")
        ),
        fixedRow(
          h5("Must assign parent with initial child node")
        ),
        fixedRow(
          actionButton("crt_parent","Create Parent")
        ),
        fixedRow(
          if(!is.null(working$org)){
            selectInput("ttl","traverse to level",choices=c("root",if(!is.null(current$ch_names)){current$ch_names}))
          }
        ),
        fixedRow(
          textInput("ch_name","Child node name")
        ),
        fixedRow(
           actionButton("add_child", "Add Child")
        ),
         fixedRow(
          textInput("sib_name","sibling node name")
         ),
        fixedRow(
          actionButton("add_sibling", "Add Sibling")
        )
      ),
      mainPanel(grVizOutput("HTATree")   )
    )
  })
  output$HTATree=renderGrViz({
     working$org 
      if(!is.null(working$org)){
        if(!is.null(current$addchild)){
        working$org$AddChild(current$addchild)
          current$ch_names <- names(working$org$children)
          current$addchild <- NULL}
        if(!is.null(current$addsibling)){
          working$org$Climb(input$ttl)$AddSibling(current$addsibling)
          current$ch_names <- names(working$org$Climb(input$ttl)$children)
          current$addsibling <- NULL}
    #child2 = org$AddChild("Child_2")
    #child1$AddSibling("Sibling")
    grViz(DiagrammeR::generate_dot(ToDiagrammeRGraph(working$org)))
    }
  })
  observeEvent(input$crt_parent,{
    working$org <- makeorg()
    print(current$prefix$children)
  })
  makeorg <- reactive({
    if(is.null(input$parent)){
      return(NULL)
    }
    if(is.null(working$org)){
   org <- Node$new(input$parent)
   org$AddChild(input$initch_name)
   current$ch_names <- names(org$children)
   return(org)}else{
     return(working$org)
   }
  })
  observeEvent(input$add_child,{
    current$addchild <- input$ch_name
      })
  observeEvent(input$add_sibling,{
    current$addsibling <- input$sib_name
  })
}

shinyApp(ui = ui, server = server) 

库（闪亮）
库（data.tree）
图书馆（图解机）
ui正如我所说，您可以添加panel来控制您的树

例如，您有基本树：

#create main tree
vv$org <- Node$new(input$root_name)
vv$org$AddChildNode(child = Node$new(input[["1_child"]]))
vv$names=vv$org$Get('name') # get names of main tree

听众：

observeEvent(input$add_child,{

    FindNode(node=vv$org,name = input$Parent_name)$AddChildNode(Node$new(input$new_node_name)) # add child
    vv$names=vv$org$Get('name')# get names of new tree

    #re-generate chart
    output$xx=renderGrViz({

      grViz(DiagrammeR::generate_dot(ToDiagrammeRGraph(vv$org)),engine = "dot")
    })
  })

2） 除去

视图：

Listener1查找所选节点的子节点：

observeEvent({
   list(input$Parent_name_remove,
    input$add_child ,
    input$remove_child)},{
      if(!is.null(input[["Parent_name_remove"]])){
        node_=FindNode(node=vv$org,name = input$Parent_name_remove)
        children_names=node_$Get('name')
        updateSelectInput(session,inputId ="Name_to_remove",choices =  children_names[children_names!=input$Parent_name_remove] )

      }
     })

Listener2要删除子项：

observeEvent(input$remove_child,{
    if(input$Name_to_remove!=""){
      FindNode(node=vv$org,name = input$Parent_name_remove)$RemoveChild(input$Name_to_remove)
      #re-generate chart
      output$xx=renderGrViz({

        grViz(DiagrammeR::generate_dot(ToDiagrammeRGraph(vv$org)),engine = "dot")
      })
    }
  })

完整代码

library(shiny); 
library(data.tree)
library(DiagrammeR)
library(shinyjs)

ui <- fluidPage(

  mainPanel(
    useShinyjs(),
    div(id="start",
        textInput("root_name","root_name","1"),
        textInput("1_child","1_child","1.1"),
        actionButton("go","go")
        ),
    uiOutput("add_child_ui"),
            grVizOutput("xx")   )
)

server <- function(input, output,session){


  #Create reative value to app
  vv=reactiveValues(org=NULL,names=NULL)

  observeEvent(input$go,{


    #create main tree
    vv$org <- Node$new(input$root_name)
    vv$org$AddChildNode(child = Node$new(input[["1_child"]]))
    vv$names=vv$org$Get('name') # get names of main tree

    output$xx=renderGrViz({

      grViz(DiagrammeR::generate_dot(ToDiagrammeRGraph(vv$org)),engine = "dot")
    })

    shinyjs::hide(id ="start" )

    output$add_child_ui=renderUI({
      fluidRow(
        column(4,selectInput("Parent_name","Parent_name",vv$names),
               textInput("new_node_name","new_node_name",""),
               actionButton("add_child","add_child")),

        column(4,selectInput("Parent_name_remove","Parent_name_remove",vv$names),
               selectInput("Name_to_remove","Name_to_remove",""),
               actionButton("remove_child","remove_child"))
      )

    })


  })










  observeEvent({
    list(input$Parent_name_remove,
         input$add_child ,
         input$remove_child)},{
           if(!is.null(input[["Parent_name_remove"]])){
             node_=FindNode(node=vv$org,name = input$Parent_name_remove)
             children_names=node_$Get('name')
             updateSelectInput(session,inputId ="Name_to_remove",choices =  children_names[children_names!=input$Parent_name_remove] )

           }
         })
  observeEvent(input$remove_child,{
    if(input$Name_to_remove!=""){
      FindNode(node=vv$org,name = input$Parent_name_remove)$RemoveChild(input$Name_to_remove)
      vv$names=vv$org$Get('name')# get names of new tree
      #re-generate chart
      output$xx=renderGrViz({

        grViz(DiagrammeR::generate_dot(ToDiagrammeRGraph(vv$org)),engine = "dot")
      })

    }
  })


  observeEvent(input$add_child,{

    FindNode(node=vv$org,name = input$Parent_name)$AddChildNode(Node$new(input$new_node_name)) # add child
    vv$names=vv$org$Get('name')# get names of new tree

    #re-generate chart
    output$xx=renderGrViz({

      grViz(DiagrammeR::generate_dot(ToDiagrammeRGraph(vv$org)),engine = "dot")
    })
  })



}


shinyApp(ui = ui, server = server) 

库（闪亮）；
库（data.tree）
图书馆（图解机）
图书馆（shinyjs）
感谢@Phi的回复。当我尝试添加childen或兄弟姐妹时，我只看到它与根直接相关，无法复制多个级别（即，将1.2.1作为子级创建为1.2）。这可能吗？好的，我已经改变了很多事情。我将制作完整的第二组代码作为第二次修订版..感谢您查看此内容。当我试图将一个子对象添加到一个子对象中，从而向层次结构/树请求第三级时，它只是将其添加到初始父对象中。这是可视化软件包的限制还是R中树生成器的限制？由于我编写代码的方式，可能还有更好的方法，您必须遍历到要添加子级或同级的“级别”。我会考虑其他方法来做这件事，回头看看我的例子，这就是你想要的？
observeEvent({
   list(input$Parent_name_remove,
    input$add_child ,
    input$remove_child)},{
      if(!is.null(input[["Parent_name_remove"]])){
        node_=FindNode(node=vv$org,name = input$Parent_name_remove)
        children_names=node_$Get('name')
        updateSelectInput(session,inputId ="Name_to_remove",choices =  children_names[children_names!=input$Parent_name_remove] )

      }
     })

observeEvent(input$remove_child,{
    if(input$Name_to_remove!=""){
      FindNode(node=vv$org,name = input$Parent_name_remove)$RemoveChild(input$Name_to_remove)
      #re-generate chart
      output$xx=renderGrViz({

        grViz(DiagrammeR::generate_dot(ToDiagrammeRGraph(vv$org)),engine = "dot")
      })
    }
  })

library(shiny); 
library(data.tree)
library(DiagrammeR)
library(shinyjs)

ui <- fluidPage(

  mainPanel(
    useShinyjs(),
    div(id="start",
        textInput("root_name","root_name","1"),
        textInput("1_child","1_child","1.1"),
        actionButton("go","go")
        ),
    uiOutput("add_child_ui"),
            grVizOutput("xx")   )
)

server <- function(input, output,session){


  #Create reative value to app
  vv=reactiveValues(org=NULL,names=NULL)

  observeEvent(input$go,{


    #create main tree
    vv$org <- Node$new(input$root_name)
    vv$org$AddChildNode(child = Node$new(input[["1_child"]]))
    vv$names=vv$org$Get('name') # get names of main tree

    output$xx=renderGrViz({

      grViz(DiagrammeR::generate_dot(ToDiagrammeRGraph(vv$org)),engine = "dot")
    })

    shinyjs::hide(id ="start" )

    output$add_child_ui=renderUI({
      fluidRow(
        column(4,selectInput("Parent_name","Parent_name",vv$names),
               textInput("new_node_name","new_node_name",""),
               actionButton("add_child","add_child")),

        column(4,selectInput("Parent_name_remove","Parent_name_remove",vv$names),
               selectInput("Name_to_remove","Name_to_remove",""),
               actionButton("remove_child","remove_child"))
      )

    })


  })










  observeEvent({
    list(input$Parent_name_remove,
         input$add_child ,
         input$remove_child)},{
           if(!is.null(input[["Parent_name_remove"]])){
             node_=FindNode(node=vv$org,name = input$Parent_name_remove)
             children_names=node_$Get('name')
             updateSelectInput(session,inputId ="Name_to_remove",choices =  children_names[children_names!=input$Parent_name_remove] )

           }
         })
  observeEvent(input$remove_child,{
    if(input$Name_to_remove!=""){
      FindNode(node=vv$org,name = input$Parent_name_remove)$RemoveChild(input$Name_to_remove)
      vv$names=vv$org$Get('name')# get names of new tree
      #re-generate chart
      output$xx=renderGrViz({

        grViz(DiagrammeR::generate_dot(ToDiagrammeRGraph(vv$org)),engine = "dot")
      })

    }
  })


  observeEvent(input$add_child,{

    FindNode(node=vv$org,name = input$Parent_name)$AddChildNode(Node$new(input$new_node_name)) # add child
    vv$names=vv$org$Get('name')# get names of new tree

    #re-generate chart
    output$xx=renderGrViz({

      grViz(DiagrammeR::generate_dot(ToDiagrammeRGraph(vv$org)),engine = "dot")
    })
  })



}


shinyApp(ui = ui, server = server)