使用shiny.router的shinydashboard的URI路由 [英] URI routing for shinydashboard using shiny.router
本文介绍了使用shiny.router的shinydashboard的URI路由的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
假设您有一个简单的shinydashboard，其中包含使用menuItem创建的链接和使用tabItems创建的页面：
library(shiny)
library(shinydashboard)
skin <- Sys.getenv("DASHBOARD_SKIN")
skin <- tolower(skin)
skin <- "blue"
## ui.R ##
sidebar <- dashboardSidebar(
sidebarMenu(
menuItem("Dashboard", tabName = "dashboard", icon = icon("dashboard")),
menuItem("Widgets", icon = icon("th"), tabName = "widgets",
badgeLabel = "new", badgeColor = "green")
)
)
body <- dashboardBody(
tabItems(
tabItem(tabName = "dashboard",
h2("Dashboard tab content")
),
tabItem(tabName = "widgets",
h2("Widgets tab content")
)
)
)
# Put them together into a dashboardPage
ui<-dashboardPage(
dashboardHeader(title = "Simple tabs"),
sidebar,
body
)
server <- function(input, output) {
}
shinyApp(ui, server)
是否可以为页面创建固定链接？例如，主页(tabName==&dashboard"；)的URL为127.0.0.1：1234/home，小部件页面位于127.0.0.1：1234/widget？
似乎shiny没有开箱即用的URL路由。shiny.router似乎是一种可能的替代方法，但我没有找到使用shinydashboard的简单方法，即使用menuItem和tabItem。我正在尝试避免重写应用程序的用户界面，以使用与shiny.router(例如shiny.semantic)更紧密集成的内容
是否可以在实现指向各种不同页面的固定链接时保留上述shinydashboard代码？
推荐答案
不使用library(shiny.router)的解决办法：
另一个编辑-使用url_hash(uri片段)：
library(shiny)
library(shinydashboard)
ui <- function(request) {
dashboardPage(
header = dashboardHeader(title = "Simple tabs"),
sidebar = dashboardSidebar(
sidebarMenu(
id = "sidebarID",
menuItem(
"Dashboard",
tabName = "dashboard",
icon = icon("tachometer-alt")
),
menuItem(
"Widgets",
icon = icon("th"),
tabName = "widgets",
badgeLabel = "new",
badgeColor = "green"
)
)
),
body = dashboardBody(tabItems(
tabItem(tabName = "dashboard",
h2("Dashboard tab content")),
tabItem(tabName = "widgets",
h2("Widgets tab content"))
))
)
}
server <- function(input, output, session) {
observeEvent(input$sidebarID, {
# http://127.0.0.1:6172/#dashboard
# http://127.0.0.1:6172/#widgets
newURL <- paste0(
session$clientData$url_protocol,
"//",
session$clientData$url_hostname,
":",
session$clientData$url_port,
session$clientData$url_pathname,
"#",
input$sidebarID
)
updateQueryString(newURL, mode = "replace", session)
})
observe({
currentTab <- sub("#", "", session$clientData$url_hash)
if(!is.null(currentTab)){
updateTabItems(session, "sidebarID", selected = currentTab)
}
})
}
shinyApp(ui, server, enableBookmarking = "disable")
编辑-使用url_earch：实际上，我们可以使用getQueryString和updateTabItems在没有书签的情况下执行相同的操作：
library(shiny)
library(shinydashboard)
ui <- function(request) {
dashboardPage(
header = dashboardHeader(title = "Simple tabs"),
sidebar = dashboardSidebar(
sidebarMenu(
id = "sidebarID",
menuItem(
"Dashboard",
tabName = "dashboard",
icon = icon("tachometer-alt")
),
menuItem(
"Widgets",
icon = icon("th"),
tabName = "widgets",
badgeLabel = "new",
badgeColor = "green"
)
)
),
body = dashboardBody(tabItems(
tabItem(tabName = "dashboard",
h2("Dashboard tab content")),
tabItem(tabName = "widgets",
h2("Widgets tab content"))
))
)
}
server <- function(input, output, session) {
observeEvent(input$sidebarID, {
# http://127.0.0.1:6172/?tab=dashboard
# http://127.0.0.1:6172/?tab=widgets
newURL <- paste0(
session$clientData$url_protocol,
"//",
session$clientData$url_hostname,
":",
session$clientData$url_port,
session$clientData$url_pathname,
"?tab=",
input$sidebarID
)
updateQueryString(newURL, mode = "replace", session)
})
observe({
currentTab <- getQueryString(session)$tab # alternative: parseQueryString(session$clientData$url_search)$tab
if(!is.null(currentTab)){
updateTabItems(session, "sidebarID", selected = currentTab)
}
})
}
shinyApp(ui, server, enableBookmarking = "disable")
使用书签：
不确定您是否对这样的解决方法感兴趣，但您可以使用Shiny的书签和updateQueryString来实现类似的行为：
library(shiny)
library(shinydashboard)
ui <- function(request) {
dashboardPage(
header = dashboardHeader(title = "Simple tabs"),
sidebar = dashboardSidebar(
sidebarMenu(
id = "sidebarID",
menuItem(
"Dashboard",
tabName = "dashboard",
icon = icon("tachometer-alt")
),
menuItem(
"Widgets",
icon = icon("th"),
tabName = "widgets",
badgeLabel = "new",
badgeColor = "green"
)
)
),
body = dashboardBody(tabItems(
tabItem(tabName = "dashboard",
h2("Dashboard tab content")),
tabItem(tabName = "widgets",
h2("Widgets tab content"))
))
)
}
server <- function(input, output, session) {
bookmarkingWhitelist <- c("sidebarID")
observe({
setBookmarkExclude(setdiff(names(input), bookmarkingWhitelist))
})
observeEvent(input$sidebarID, {
# http://127.0.0.1:6172/?_inputs_&sidebarID=%22dashboard%22
# http://127.0.0.1:6172/?_inputs_&sidebarID=%22widgets%22
newURL <- paste0(
session$clientData$url_protocol,
"//",
session$clientData$url_hostname,
":",
session$clientData$url_port,
session$clientData$url_pathname,
"?_inputs_&sidebarID=%22",
input$sidebarID,
"%22"
)
updateQueryString(newURL,
mode = "replace",
session)
})
}
shinyApp(ui, server, enableBookmarking = "url")
部分相关链接：
- https://rstudio.github.io/shinydashboard/behavior.html#bookmarking
- https://shiny.rstudio.com/reference/shiny/1.7.0/session.html
- It is possible to restore a session, locally, in a Shiny app if the inputs have been previously written in a RDS file?
- shinyjs - setBookmarkExclude for delay IDs
- https://github.com/rstudio/shiny/issues/3546
这篇关于使用shiny.router的shinydashboard的URI路由的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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