File Input Function

This function create a file upload component. It uses the basis of the shiny fileInput function, but restyles the label and adds error onto it. It doesn't look like the www.gov.uk/ style one, although this www.gov.uk/ doesn't seem to have a settle style as, for example it changes between Firefox and Chrome

Usage

file_Input(
  inputId,
  label,
  multiple = FALSE,
  accept = NULL,
  width = NULL,
  buttonLabel = "Choose file",
  placeholder = "No file chosen",
  error = FALSE,
  error_message = NULL
)

Arguments

inputId

The input slot that will be used to access the value.

label

Display label for the control, or NULL for no label.

multiple

Whether the user should be allowed to select and upload multiple files at once. Does not work on older browsers, including Internet Explorer 9 and earlier.

accept

A character vector of MIME types; gives the browser a hint of what kind of files the server is expecting.

width

The width of the input, e.g. '400px', or '100%'

buttonLabel

The label used on the button. Can be text or an HTML tag object.

placeholder

The text to show before a file has been uploaded.

error

Whenever to icnlud error handling Defaults to FALSE.

error_message

Message to display on error. Defaults to NULL

Value

a file input html shiny object

Examples

if (interactive()) {
  ui <- fluidPage(
    # Required for error handling function
    shinyjs::useShinyjs(),
    shinyGovstyle::header(
      main_text = "Example",
      secondary_text = "User Examples",
      logo="shinyGovstyle/images/moj_logo.png"),
    shinyGovstyle::banner(
    inputId = "banner", type = "beta", 'This is a new service'),
    shinyGovstyle::gov_layout(size = "two-thirds",
      # Simple file input
      shinyGovstyle::file_Input(inputId = "file1", label = "Upload a file"),
      # Error file
      shinyGovstyle::file_Input(
        inputId = "file2",
        label = "Upload a file",
        error = TRUE),
      # Button to trigger error
      shinyGovstyle::button_Input(inputId = "submit", label = "Submit")
    ),
    shinyGovstyle::footer(full = TRUE)
  )

  server <- function(input, output, session) {
    #'Trigger error on blank submit of file2
    observeEvent(input$submit, {
      if (is.null(input$file2)){
        shinyGovstyle::error_on(inputId = "file2")
      } else {
        shinyGovstyle::error_off(
          inputId = "file2")
      }
    })
  }
  shinyApp(ui = ui, server = server)
}