我正在尝试生成多个menuItem
动态地,可能很简单,但我没有得到正确的想法。
library(shiny)
library(shinydashboard)
port_tables<-c("tab1","tab2","tab3","tab4") # These are from a DB connection in the original code
function(input, output) {
output$smenu1 <- renderMenu({
sidebarMenu( id = "tabs",
h4("Tables",style="color:yellow;margin-left:20px;"),
paste("menuItem(\"",port_tables,"\",tabName=\"",port_tables,"\",icon=icon('th'))",collapse=",")
)
})
)
菜单项来自paste
函数无法解析(我在侧边栏上得到粘贴函数的结果)。我试过eval
, eval(parse(paste(...)))
,两者都不起作用 - 我错过了什么?
我不太明白你要什么,但这是一个带有动态菜单的例子。
library(shiny)
library(shinydashboard)
ui <- dashboardPage(
dashboardHeader(title = "Dynamic Menu"),
dashboardSidebar(
sidebarMenuOutput(outputId = "dy_menu")
),
dashboardBody(
tabItems(
tabItem(tabName = "main",
textInput(inputId = "new_menu_name",
label = "New Menu Name"),
actionButton(inputId = "add",
label = "Add Menu")
)
)
)
)
server <- function(input, output, session){
output$dy_menu <- renderMenu({
menu_list <- list(
menuItem("Add Menu Items", tabName = "main", selected = TRUE),
menu_vals$menu_list)
sidebarMenu(.list = menu_list)
})
menu_vals = reactiveValues(menu_list = NULL)
observeEvent(eventExpr = input$add,
handlerExpr = {
menu_vals$menu_list[[length(menu_vals$menu_list) + 1]] <- menuItem(input$new_menu_name,
tabName = input$new_menu_name)
})
}
shinyApp(ui, server)
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