Define the (multiple) search selection dropdown input for retrieving remote selection menu content from an API endpoint. API response is expected to be a JSON with property fields `name` and `value`. Using a search selection dropdown allows to search more easily through large lists.
search_selection_api(
name,
search_api_url,
multiple = FALSE,
default_text = "Select"
)Input name. Reactive value is available under input[[name]].
Register API url with server JSON Response containing fields `name` and `value`.
TRUE if the dropdown should allow multiple selections, FALSE otherwise (default FALSE).
Text to be visible on dropdown when nothing is selected.
#'@examples ## Only run examples in interactive R sessions if (interactive()) library(shiny) library(shiny.semantic) library(gapminder) library(dplyr)
ui <- function() shinyUI( semanticPage( title = "Dropdown example", uiOutput("search_letters"), p("Selected letter:"), textOutput("selected_letters") ) )
server <- shinyServer(function(input, output, session)
search_api <- function(gapminder, q) has_matching <- function(field) startsWith(field, q) gapminder mutate(country = as.character(country)) select(country) unique filter(has_matching(country)) head(5) transmute(name = country, value = country)
search_api_url <- shiny.semantic::register_search(session, gapminder, search_api) output$search_letters <- shiny::renderUI( search_selection_api("search_result", search_api_url, multiple = TRUE) ) output$selected_letters <- renderText(input[["search_result"]]) )
shinyApp(ui = ui(), server = server)