[英]Dynamically Create box() within tabItem()
我正在使用shinydashboard
构建一个shiny
应用程序。 其目的是在每个tabItem()
(即仪表板的每个页面)内显示一组“卡片”(技术上是box()
元素)。 该应用程序由 external.csv 文件(在此表示中为 object dat
)驱动,该文件 (1) 定义应用程序内的页面,(2) 指定每个页面内box()
元素的数量。
我已经能够使用dat
中的类别成功创建一组tabItem
(即页面)。 从这里开始,我无法弄清楚如何为每个tabItem
动态添加正确数量的框。 如果您检查dat
,您将看到有两个类别(页面):蓝色和绿色。 蓝色类别需要我渲染两个框(框 A 和框 B),而绿色类别需要我渲染框 C - E。因此,名为“蓝色”的页面应该呈现两个框,而名为“绿色”的页面应该渲染三个盒子。
有人可以帮助我使用以下代码,以便为正确的页面呈现正确的框吗? 如果 box_name 和 box_desc 可以分别作为box()
的标题和内容出现,则更加感谢!
library(shiny)
library(shinydashboard)
dat<-tibble::tibble(category = c("blue", "blue", "green", "green", "green"),
box_name = c("Box A", "Box B", "Box C", "Box D", "Box E"),
box_desc = c("Foo", "Bar", "Bar", "Foo", "Foo"))
sidebar <- dashboardSidebar(
sidebarMenu(
menuItem("Blue", tabName = "blue", icon = icon("dashboard")),
menuItem("Green", icon = icon("th"), tabName = "green")
)
)
body <- dashboardBody(
uiOutput("render_reports")
)
header<-dashboardHeader()
ui <- dashboardPage(header, sidebar, body)
server <- function(input, output) {
output$render_reports <- renderUI({
pages <- lapply(unique(dat$category), function(name){
tabItem(tabName = name, fluidRow(box(
title = name, paste0("Something here about ", name), width = 12, solidHeader = TRUE, status = "primary"
)),
fluidRow(
box(title = "box_title here", "box_desc here")
))
})
items <- c(pages)
do.call(tabItems, items)
})
}
shinyApp(ui, server)
需要renderUI
吗?
没有renderUI
它可以正常工作(并且速度更快):
library(shiny)
library(shinydashboard)
dat <- tibble::tibble(
category = c("blue", "blue", "green", "green", "green"),
box_name = c("Box A", "Box B", "Box C", "Box D", "Box E"),
box_desc = c("Foo", "Bar", "Bar", "Foo", "Foo")
)
sidebar <- dashboardSidebar(sidebarMenu(
menuItem("Blue", tabName = "blue", icon = icon("dashboard")),
menuItem("Green", tabName = "green", icon = icon("th"))
))
body <- dashboardBody({
items <- lapply(unique(dat$category), function(name) {
tabItem(tabName = name, fluidRow(
lapply(which(dat$category %in% name), function(i) {
box(
dat$box_desc[i],
title = dat$box_name[i],
paste0("Something here about ", name),
width = 12,
solidHeader = TRUE,
status = "primary"
)
}))
)})
do.call(tabItems, items)
})
header <- dashboardHeader()
ui <- dashboardPage(header, sidebar, body)
server <- function(input, output) {}
shinyApp(ui, server)
使用renderUI
仅在切换选项卡后才会呈现项目 - 因为在首次呈现 dashboardBody 时框不存在:
library(shiny)
library(shinydashboard)
dat <- tibble::tibble(
category = c("blue", "blue", "green", "green", "green"),
box_name = c("Box A", "Box B", "Box C", "Box D", "Box E"),
box_desc = c("Foo", "Bar", "Bar", "Foo", "Foo")
)
sidebar <- dashboardSidebar(sidebarMenu(
menuItem("Blue", tabName = "blue", icon = icon("dashboard")),
menuItem("Green", tabName = "green", icon = icon("th"))
))
body <- dashboardBody(uiOutput("renderReports"))
header <- dashboardHeader()
ui <- dashboardPage(header, sidebar, body)
server <- function(input, output) {
output$renderReports <- renderUI({
items <- lapply(unique(dat$category), function(name) {
tabItem(tabName = name, fluidRow(
lapply(which(dat$category %in% name), function(i) {
box(
dat$box_desc[i],
title = dat$box_name[i],
paste0("Something here about ", name),
width = 12,
solidHeader = TRUE,
status = "primary"
)
}))
)})
do.call(tabItems, items)
})
}
shinyApp(ui, server)
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