我想在一些navbarPage之后将全局搜索字段放入tabPanel。我不确定是否可能，因为我的所有测试都在textInput之外产生navbar。
rStudio闪亮布局指南指向bootstrap navbar documentation，他们实际上就是这样做的。但我无法使用我的闪亮应用程序重现它。
library(shiny)
ui <- shinyUI(
shiny::navbarPage('test',
shiny::tabPanel('my app',
fluidPage(
# Application title
titlePanel("Old Faithful Geyser Data"),
# Sidebar with a slider input for number of bins
sidebarLayout(
sidebarPanel(
sliderInput("bins",
"Number of bins:",
min = 1,
max = 50,
value = 30)
),
# Show a plot of the generated distribution
mainPanel(
plotOutput("distPlot")
)
))),
### Still inside navbarPage
shiny::textInput("text",
label=h3("Text input"),
value="should be inside the navbar!")
))
server <- function(input, output, session) {
output$distPlot <- renderPlot({
# generate bins based on input$bins from ui.R
x <- faithful[, 2]
bins <- seq(min(x), max(x), length.out = input$bins + 1)
# draw the histogram with the specified number of bins
hist(x, breaks = bins, col = 'darkgray', border = 'white')
})
}
shinyApp(ui, server)
答案 0 :(得分：6)
您可以通过稍微操纵导航栏HTML来完成此操作。 Valter是正确的 - 你可以通过完全用HTML构建菜单而不是使用Shiny来实现这一点。但是有一种更简单的方法：您可以使用常规Shiny构建导航栏，然后使用htmltools稍微修改它。这是我认为目前提出的解决方案中最干净的一个快速解决方案：
library(shiny)
navbarPageWithInputs <- function(..., inputs) {
navbar <- navbarPage(...)
form <- tags$form(class = "navbar-form", inputs)
navbar[[3]][[1]]$children[[1]] <- htmltools::tagAppendChild(
navbar[[3]][[1]]$children[[1]], form)
navbar
}
ui <- navbarPageWithInputs(
"Test app",
tabPanel("tab1", "tab 1", textOutput("out")),
tabPanel("tab2", "tab 2"),
inputs = textInput("search", NULL, placeholder = "Search")
)
server <- function(input, output, session) {
output$out <- renderText(input$search)
}
shinyApp(ui = ui, server = server)
基本上我创建了一个navbarPageWithInputs()函数，它接受与navbarPage()相同的所有参数，以及inputs参数。所有这个函数都调用常规navbarPage()，然后将给定的输入添加到HTML。
答案 1 :(得分：1)
在基础Shiny中你可以使用tabPanel来实现，如果重新呈现当前tabPanel并不昂贵：
ui <- navbarPage('test',id='test',
tabPanel('my app1',
titlePanel("Old Faithful Geyser Data1"),
sidebarLayout(
sidebarPanel(
sliderInput("bins",
"Number of bins:",
min = 1,
max = 50,
value = 30)),
mainPanel(plotOutput("distPlot1")))),
tabPanel('my app2',
titlePanel("Old Faithful Geyser Data2"),
sidebarLayout(
sidebarPanel(
sliderInput("bins",
"Number of bins:",
min = 1,
max = 50,
value = 30)),
mainPanel(plotOutput("distPlot2")))),
tabPanel( value= "search_panel",
textInput("search", label=NULL, value="Search"))
)
server <- function(input, output, session) {
observe({
if(!is.null(input$test)){
if(input$test=="search_panel") # Go back to last active panel
updateNavbarPage(session, 'test', selected = selected_panel)
else # Save active panel
selected_panel <<- input$test
}
})
searchtext <- reactive({
if(!is.null(input$search))
if(input$search!="Search")
return(input$search)
return(NULL)
})
output$distPlot1 <- renderPlot({
x <- faithful[, 2]
bins <- seq(min(x), max(x), length.out = input$bins + 1)
hist(x, breaks = bins, col = 'darkgray', border = 'white',
main=ifelse(is.null(searchtext()), "Alt title 1", searchtext()))
})
output$distPlot2 <- renderPlot({
x <- faithful[, 2]
bins <- seq(min(x), max(x), length.out = input$bins + 1)
hist(x, breaks = bins, col = 'darkgray', border = 'white',
main=ifelse(is.null(searchtext()), "Alt title 2", searchtext()))
})
}
shinyApp(ui, server)
答案 2 :(得分：0)
这是使用HTML重建菜单的一种可能方式。它看起来不是很干净，但它可以满足您的需求。
app.R
library(shiny)
ui <- shinyUI(
tagList(
bootstrapPage(
HTML('
<nav class="navbar navbar-default" role="navigation">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Old Faithful Geyser Data</a>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li class="active"><a href="#plot1" data-toggle="tab" data-value="Plot1">First</a></li>
<li><a href="#plot2" data-toggle="tab" data-value="Plot2">Second</a></li>
</ul>
<div class="col-sm-3 col-md-3">
<form class="navbar-form" role="search">
<div class="input-group">
<input id="searchBox" type="text" class="form-control" placeholder="Search" name="q">
</div>
</form>
</div>
</div><!-- /.navbar-collapse -->
</nav>
'),
tags$div(class="container-fluid",
tags$div(class="tab-content",
HTML('<div class="tab-pane active" data-value="Plot1" id="plot1">'),
sliderInput("bins1",
"Number of bins:",
min = 1,
max = 50,
value = 30),
plotOutput("distPlot1"),
verbatimTextOutput("searchBoxValuePlot1"),
HTML('</div>'),
HTML('<div class="tab-pane" data-value="Plot2" id="plot2">'),
sliderInput("bins2",
"Number of bins:",
min = 1,
max = 50,
value = 30),
plotOutput("distPlot2"),
verbatimTextOutput("searchBoxValuePlot2"),
HTML('</div>')
)
)
)
))
server <- function(input, output, session) {
output$distPlot1 <- renderPlot({
# generate bins based on input$bins from ui.R
x <- faithful[, 2]
bins <- seq(min(x), max(x), length.out = input$bins1 + 1)
# draw the histogram with the specified number of bins
hist(x, breaks = bins, col = 'darkgray', border = 'white')
})
output$distPlot2 <- renderPlot({
# generate bins based on input$bins from ui.R
x <- faithful[, 1]
bins <- seq(min(x), max(x), length.out = input$bins2 + 1)
# draw the histogram with the specified number of bins
hist(x, breaks = bins, col = 'darkgray', border = 'white')
})
searchBoxValue <- reactive({
input$searchBox
})
output$searchBoxValuePlot1 <- renderPrint({
paste("You entered: ", searchBoxValue(), "and you are on the first link", sep = " ")
})
output$searchBoxValuePlot2 <- renderPrint({
paste("You entered: ", searchBoxValue(), "and you are on the second link", sep = " ")
})
}
shinyApp(ui, server)