updateKnobInput: Change the value of a knob input on the client

In shinyWidgets: Custom Inputs Widgets for Shiny

Change the value of a knob input on the client

Description

Change the value of a knob input on the client

Usage

updateKnobInput(
  session = getDefaultReactiveDomain(),
  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)

}

shinyWidgets documentation built on Sept. 23, 2024, 9:07 a.m.