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315 lines
9.2 KiB
R
315 lines
9.2 KiB
R
#' Change the value of a text input on the client
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#'
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#' @template update-input
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#' @param value The value to set for the input object.
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#'
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#' @seealso \code{\link{textInput}}
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#'
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#' @examples
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#' \dontrun{
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#' shinyServer(function(input, output, clientData, session) {
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#'
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#' observe({
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#' # We'll use the input$controller variable multiple times, so save it as x
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#' # for convenience.
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#' x <- input$controller
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#'
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#' # This will change the value of input$inText, based on x
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#' updateTextInput(session, "inText", value = paste("New text", x))
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#'
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#' # Can also set the label, this time for input$inText2
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#' updateTextInput(session, "inText2",
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#' label = paste("New label", x),
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#' value = paste("New text", x))
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#' })
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#' })
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#' }
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#' @export
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updateTextInput <- function(session, inputId, label = NULL, value = NULL) {
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message <- dropNulls(list(label=label, value=value))
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session$sendInputMessage(inputId, message)
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}
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#' Change the value of a checkbox input on the client
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#'
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#' @template update-input
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#' @param value The value to set for the input object.
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#'
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#' @seealso \code{\link{checkboxInput}}
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#'
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#' @examples
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#' \dontrun{
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#' shinyServer(function(input, output, clientData, session) {
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#'
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#' observe({
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#' # TRUE if input$controller is even, FALSE otherwise.
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#' x_even <- input$controller %% 2 == 0
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#'
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#' updateCheckboxInput(session, "inCheckbox", value = x_even)
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#' })
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#' })
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#' }
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#' @export
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updateCheckboxInput <- updateTextInput
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#' Change the value of a slider input on the client
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#'
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#' @template update-input
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#' @param value The value to set for the input object.
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#'
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#' @seealso \code{\link{sliderInput}}
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#'
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#' @examples
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#' \dontrun{
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#' shinyServer(function(input, output, clientData, session) {
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#'
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#' observe({
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#' # We'll use the input$controller variable multiple times, so save it as x
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#' # for convenience.
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#' x <- input$controller
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#'
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#' # Similar to number and text. only label and value can be set for slider
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#' updateSliderInput(session, "inSlider",
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#' label = paste("Slider label", x),
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#' value = x)
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#'
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#' # For sliders that pick out a range, pass in a vector of 2 values.
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#' updateSliderInput(session, "inSlider2", value = c(x-1, x+1))
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#'
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#' # An NA means to not change that value (the low or high one)
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#' updateSliderInput(session, "inSlider3", value = c(NA, x+2))
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#' })
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#' })
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#' }
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#' @export
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updateSliderInput <- updateTextInput
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#' Change the selected tab on the client
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#'
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#' @param session The \code{session} object passed to function given to
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#' \code{shinyServer}.
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#' @param inputId The id of the tabset panel object.
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#' @param selected The name of the tab to make active.
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#'
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#' @seealso \code{\link{tabsetPanel}}
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#'
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#' @examples
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#' \dontrun{
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#' shinyServer(function(input, output, clientData, session) {
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#'
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#' observe({
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#' # TRUE if input$controller is even, FALSE otherwise.
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#' x_even <- input$controller %% 2 == 0
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#'
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#' # Change the selected tab.
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#' # Note that the tabsetPanel must have been created with an 'id' argument
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#' if (x_even) {
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#' updateTabsetPanel(session, "inTabset", selected = "panel2")
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#' } else {
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#' updateTabsetPanel(session, "inTabset", selected = "panel1")
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#' }
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#' })
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#' })
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#' }
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#' @export
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updateTabsetPanel <- function(session, inputId, selected = NULL) {
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message <- dropNulls(list(value = selected))
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session$sendInputMessage(inputId, message)
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}
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#' Change the value of a number input on the client
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#'
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#' @template update-input
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#' @param value The value to set for the input object.
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#' @param min Minimum value.
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#' @param max Maximum value.
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#' @param step Step size.
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#'
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#' @seealso \code{\link{numericInput}}
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#'
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#' @examples
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#' \dontrun{
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#' shinyServer(function(input, output, clientData, session) {
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#'
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#' observe({
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#' # We'll use the input$controller variable multiple times, so save it as x
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#' # for convenience.
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#' x <- input$controller
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#'
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#' updateNumericInput(session, "inNumber", value = x)
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#'
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#' updateNumericInput(session, "inNumber2",
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#' label = paste("Number label ", x),
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#' value = x, min = x-10, max = x+10, step = 5)
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#' })
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#' })
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#' }
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#' @export
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updateNumericInput <- function(session, inputId, label = NULL, value = NULL,
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min = NULL, max = NULL, step = NULL) {
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message <- dropNulls(list(label=label, value=value, min=min, max=max, step=step))
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session$sendInputMessage(inputId, message)
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}
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#' Change the value of a checkbox group input on the client
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#'
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#' @template update-input
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#' @param choices A named vector or named list of options. For each item, the
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#' name will be used as the label, and the value will be used as the value.
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#' @param selected A vector or list of options which will be selected.
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#'
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#' @seealso \code{\link{checkboxGroupInput}}
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#'
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#' @examples
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#' \dontrun{
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#' shinyServer(function(input, output, clientData, session) {
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#'
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#' observe({
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#' # We'll use the input$controller variable multiple times, so save it as x
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#' # for convenience.
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#' x <- input$controller
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#'
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#' # Create a list of new options, where the name of the items is something
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#' # like 'option label x 1', and the values are 'option-x-1'.
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#' cb_options <- list()
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#' cb_options[[sprintf("option label %d 1", x)]] <- sprintf("option-%d-1", x)
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#' cb_options[[sprintf("option label %d 2", x)]] <- sprintf("option-%d-2", x)
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#'
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#' # Change values for input$inCheckboxGroup
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#' updateCheckboxGroupInput(session, "inCheckboxGroup", choices = cb_options)
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#'
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#' # Can also set the label and select items
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#' updateCheckboxGroupInput(session, "inCheckboxGroup2",
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#' label = paste("checkboxgroup label", x),
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#' choices = cb_options,
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#' selected = sprintf("option label %d 2", x)
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#' )
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#' })
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#' })
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#' }
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#' @export
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updateCheckboxGroupInput <- function(session, inputId, label = NULL,
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choices = NULL, selected = NULL) {
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choices <- choicesWithNames(choices)
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options <- list()
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for (i in seq_along(choices)) {
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choiceName <- names(choices)[i]
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opt <- list(value = choices[[i]],
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label = choiceName,
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checked = choiceName %in% selected)
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options[[i]] <- opt
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}
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message <- dropNulls(list(label = label, options = options))
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session$sendInputMessage(inputId, message)
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}
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#' Change the value of a radio input on the client
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#'
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#' @template update-input
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#' @param choices A named vector or named list of options. For each item, the
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#' name will be used as the label, and the value will be used as the value.
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#' @param selected A vector or list of options which will be selected.
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#'
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#' @seealso \code{\link{radioButtons}}
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#'
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#' @examples
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#' \dontrun{
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#' shinyServer(function(input, output, clientData, session) {
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#'
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#' observe({
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#' # We'll use the input$controller variable multiple times, so save it as x
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#' # for convenience.
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#' x <- input$controller
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#'
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#' r_options <- list()
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#' r_options[[sprintf("option label %d 1", x)]] <- sprintf("option-%d-1", x)
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#' r_options[[sprintf("option label %d 2", x)]] <- sprintf("option-%d-2", x)
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#'
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#' # Change values for input$inRadio
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#' updateRadioButtons(session, "inRadio", choices = r_options)
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#'
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#' # Can also set the label and select an item
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#' updateRadioButtons(session, "inRadio2",
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#' label = paste("Radio label", x),
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#' choices = r_options,
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#' selected = sprintf("option label %d 2", x)
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#' )
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#' })
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#' })
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#' }
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#' @export
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updateRadioButtons <- updateCheckboxGroupInput
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#' Change the value of a select input on the client
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#'
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#' @template update-input
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#' @param choices A named vector or named list of options. For each item, the
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#' name will be used as the label, and the value will be used as the value.
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#' @param selected A vector or list of options which will be selected.
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#'
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#' @seealso \code{\link{selectInput}}
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#'
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#' @examples
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#' \dontrun{
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#' shinyServer(function(input, output, clientData, session) {
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#'
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#' observe({
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#' # We'll use the input$controller variable multiple times, so save it as x
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#' # for convenience.
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#' x <- input$controller
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#'
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#' # Create a list of new options, where the name of the items is something
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#' # like 'option label x 1', and the values are 'option-x-1'.
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#' s_options <- list()
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#' s_options[[sprintf("option label %d 1", x)]] <- sprintf("option-%d-1", x)
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#' s_options[[sprintf("option label %d 2", x)]] <- sprintf("option-%d-2", x)
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#'
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#' # Change values for input$inSelect
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#' updateSelectInput(session, "inSelect", choices = s_options)
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#'
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#' # Can also set the label and select an item (or more than one if it's a
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#' # multi-select)
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#' updateSelectInput(session, "inSelect2",
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#' label = paste("Select label", x),
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#' choices = s_options,
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#' selected = sprintf("option label %d 2", x)
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#' )
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#' })
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#' })
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#' }
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#' @export
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updateSelectInput <- function(session, inputId, label = NULL, choices = NULL,
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selected = NULL) {
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choices <- choicesWithNames(choices)
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options <- list()
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for (i in seq_along(choices)) {
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choiceName <- names(choices)[i]
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opt <- list(value = choices[[i]],
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label = choiceName,
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selected = choiceName %in% selected)
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options[[i]] <- opt
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}
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message <- dropNulls(list(label = label, options = options))
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session$sendInputMessage(inputId, message)
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}
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