Active tab to select radio button in Shiny - r

Question

I have the following Shiny app code where the user can select radio buttons and then the corresponding tab panel is activated.
The question I have is how to do the reverse i.e. if the user selects a tab panel, how do you activate the corresponding radio button.
A reproducible example is below.
If you select Tab 2 radio button for example, Tab 2 is activated
If you then select Tab 3, then Tab 2 radio button remains selected and I would like it to update to Tab 3 radio button
Thanks
library(shiny)
radio_button_choices = list("Tab 1" = 1, "Tab 2" = 2, "Tab 3" = 3)
ui <- fluidPage(
sidebarLayout(
sidebarPanel(
radioButtons(inputId = "radio_button", label = h5("Select tab"), choices = radio_button_choices)),
mainPanel(
tabsetPanel(id = "tab",
tabPanel("Tab1", value = "panel1", htmlOutput("text1")),
tabPanel("Tab2", value = "panel2", htmlOutput("text2")),
tabPanel("Tab3", value = "panel3", htmlOutput("text3"))
)
)
)
)
server <- function(input, output, session) {
observeEvent(input$radio_button, {
updateTabsetPanel(session, "tab",
selected = paste0("panel", input$radio_button)
)
})
output$text1 = renderUI({
str1 = "This is tab 1"
HTML(paste(str1))
})
output$text2 = renderUI({
str1 = "This is tab 2"
HTML(paste(str1))
})
output$text3 = renderUI({
str1 = "This is tab 3"
HTML(paste(str1))
})
}
# Run the application
shinyApp(ui = ui, server = server)

Answer 1

You can do something similar with updateRadioButtons.
You also might like a similar vector for your tabPanel choices.
library(shiny)
radio_button_choices = list("Tab 1" = 1, "Tab 2" = 2, "Tab 3" = 3)
panel_choices = list("Panel 1" = 1, "Panel 2" = 2, "Panel 3" = 3)
ui <- fluidPage(
sidebarLayout(
sidebarPanel(
radioButtons(inputId = "radio_button", label = h5("Select tab"), choices = radio_button_choices)),
mainPanel(
tabsetPanel(id = "tab",
tabPanel(names(panel_choices)[1], value = panel_choices[[1]], htmlOutput("text1")),
tabPanel(names(panel_choices)[2], value = panel_choices[[2]], htmlOutput("text2")),
tabPanel(names(panel_choices)[3], value = panel_choices[[3]], htmlOutput("text3"))
)
)
)
)
server <- function(input, output, session) {
observeEvent(input$radio_button, {
updateTabsetPanel(session, "tab", selected = input$radio_button)
})
output$text1 = renderUI({
str1 = "This is tab 1"
HTML(paste(str1))
})
output$text2 = renderUI({
str1 = "This is tab 2"
HTML(paste(str1))
})
output$text3 = renderUI({
str1 = "This is tab 3"
HTML(paste(str1))
})
observeEvent(input$tab, {
updateRadioButtons(session, "radio_button", selected = input$tab)
})
}
# Run the application
shinyApp(ui = ui, server = server)