我想基于nested list中的text
个元素递归地在SHINY中创建div
个元素:
nodes <- list(
list(
text = "RootA",
state = list(loaded = TRUE, opened = TRUE, selected = FALSE, disabled = FALSE),
children = list(
list(
text = "ChildA1",
state = list(loaded = TRUE, opened = TRUE, selected = FALSE, disabled = FALSE)
),
list(
text = "ChildA2",
state = list(loaded = TRUE, opened = TRUE, selected = FALSE, disabled = FALSE)
)
)
),
list(
text = "RootB",
state = list(loaded = TRUE, opened = TRUE, selected = FALSE, disabled = FALSE),
children = list(
list(
text = "ChildB1",
state = list(loaded = TRUE, opened = TRUE, selected = FALSE, disabled = FALSE),
children = list(
list(
text = "ChildB1a",
state = list(loaded = TRUE, opened = TRUE, selected = FALSE, disabled = FALSE)
),
list(
text = "ChildB1b",
state = list(loaded = TRUE, opened = TRUE, selected = FALSE, disabled = FALSE)
)
)
),
list(
text = "ChildB2",
state = list(loaded = TRUE, opened = TRUE, selected = FALSE, disabled = FALSE)
)
)
)
)
我试着使用purrr:map
,但它只在顶层有效:
purrr::map(nodes, function(x){
if("text" %in% names(x)){
div(x$text)
}
})
这是我的预期输出(使用style参数只是为了说明):
library(shiny)
divs <- list(
div("RootA",
div("ChildA1"),
div("ChildA2"),
style = "background-color: aqua;"
),
div("RootB",
div("ChildB1",
div("ChildB1a"),
div("ChildB1b")),
div("ChildB2"),
style = "background-color: lightgreen;"
)
)
ui <- fluidPage(
divs
)
server <- function(input, output, session) {
}
shinyApp(ui, server)