Change the value of a knob input on the client

updateKnobInput(session, inputId, label = NULL, value = NULL, options = NULL)

Arguments

session

Standard shiny session.

inputId

The id of the input object.

label

The label to set for the input object.

value

The value to set for the input object.

options

List of additional parameters to update, use knobInput's arguments.

Examples

if (interactive()) { library("shiny") library("shinyWidgets") ui <- fluidPage( tags$h1("knob update examples"), br(), fluidRow( column( width = 6, knobInput( inputId = "knob1", label = "Update value:", value = 75, angleOffset = 90, lineCap = "round" ), verbatimTextOutput(outputId = "res1"), sliderInput( inputId = "upknob1", label = "Update knob:", min = 0, max = 100, value = 75 ) ), column( width = 6, knobInput( inputId = "knob2", label = "Update label:", value = 50, angleOffset = -125, angleArc = 250 ), verbatimTextOutput(outputId = "res2"), textInput(inputId = "upknob2", label = "Update label:") ) ) ) server <- function(input, output, session) { output$res1 <- renderPrint(input$knob1) observeEvent(input$upknob1, { updateKnobInput( session = session, inputId = "knob1", value = input$upknob1 ) }, ignoreInit = TRUE) output$res2 <- renderPrint(input$knob2) observeEvent(input$upknob2, { updateKnobInput( session = session, inputId = "knob2", label = input$upknob2 ) }, ignoreInit = TRUE) } shinyApp(ui = ui, server = server) }