在shinydashboard
中有多个标签,例如此处
library(shiny)
library(shinydashboard)
ui <- dashboardPage(
dashboardHeader(title = "Sample Shiny"),
dashboardSidebar(
sidebarMenu(
menuItem("Tab 1", tabName = "tab1"),
menuItem("Tab 2", tabName = "tab2")
)
),
dashboardBody(
tabItems(
tabItem(
"tab1",
fluidRow(
box(title = "Foo")
)
),
tabItem(
"tab2",
fluidRow(
box(title = "Bar")
)
)
)
)
)
server <- function(input, output) { }
shinyApp(ui = ui, server = server)
是否可以让应用程序定期切换活动标签?我想让我的屏幕上的仪表板每隔x分钟切换一次活动标签。
我已经检查了Shiny文档的解决方案,但还没有找到合适的功能。但也许我只是忽略了这样一个功能。如果Shiny没有提供合适的功能,是否可以包含一些可以完成这项工作的自定义JavaScript?
答案 0 :(得分:2)
这是一种使用invalidateLater和updateTabItems的方法:
app.R:
library(shiny)
library(shinydashboard)
ui <- dashboardPage(
dashboardHeader(title = "Sample Shiny"),
dashboardSidebar(
sidebarMenu(
id = 'tabs',
menuItem("Tab 1", tabName = "tab1"),
menuItem("Tab 2", tabName = "tab2")
)
),
dashboardBody(
tabItems(
tabItem(
"tab1",
fluidRow(
box(title = "Foo")
)
),
tabItem(
"tab2",
fluidRow(
box(title = "Bar")
)
)
)
)
)
tabnames = c('tab1', 'tab2')
server <- function(input, output, session) {
#keep track of active tab
active <- reactiveValues(tab = 1)
observe({
#Change every 5 secs, you can set this to whatever you want
invalidateLater(5000,session)
#update tab
isolate(active$tab <- active$tab%%length(tabnames) + 1)
updateTabItems(session,'tabs',tabnames[active$tab])
})
}
shinyApp(ui = ui, server = server)