Knob Input

knobInput(
  inputId,
  label,
  value,
  min = 0,
  max = 100,
  step = 1,
  angleOffset = 0,
  angleArc = 360,
  cursor = FALSE,
  thickness = NULL,
  lineCap = c("default", "round"),
  displayInput = TRUE,
  displayPrevious = FALSE,
  rotation = c("clockwise", "anticlockwise"),
  fgColor = NULL,
  inputColor = NULL,
  bgColor = NULL,
  pre = NULL,
  post = NULL,
  fontSize = NULL,
  readOnly = FALSE,
  skin = NULL,
  width = NULL,
  height = NULL,
  immediate = TRUE
)

Arguments

inputId

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

label

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

value

Initial value.

min

Minimum allowed value, default to 0.

max

Maximum allowed value, default to 100.

step

Specifies the interval between each selectable value, default to 1.

angleOffset

Starting angle in degrees, default to 0.

angleArc

Arc size in degrees, default to 360.

cursor

Display mode "cursor", don't work properly if width is not set in pixel, (TRUE or FALSE).

thickness

Gauge thickness, numeric value.

lineCap

Gauge stroke endings, 'default' or 'round'.

displayInput

Hide input in the middle of the knob (TRUE or FALSE).

displayPrevious

Display the previous value with transparency (TRUE or FALSE).

rotation

Direction of progression, 'clockwise' or 'anticlockwise'.

fgColor

Foreground color.

inputColor

Input value (number) color.

bgColor

Background color.

pre

A prefix string to put in front of the value.

post

A suffix string to put after the value.

fontSize

Font size, must be a valid CSS unit.

readOnly

Disable knob (TRUE or FALSE).

skin

Change Knob skin, only one option available : 'tron'.

width, height

The width and height of the input, e.g. 400px, or 100%. A value a pixel is recommended, otherwise the knob won't be able to initialize itself in some case (if hidden at start for example).

immediate

If TRUE (default), server-side value is updated each time value change, if FALSE value is updated when user release the widget.

Value

Numeric value server-side.

See also

updateKnobInput for updating the value server-side.

Examples

if (interactive()) { library("shiny") library("shinyWidgets") ui <- fluidPage( knobInput( inputId = "myKnob", label = "Display previous:", value = 50, min = -100, displayPrevious = TRUE, fgColor = "#428BCA", inputColor = "#428BCA" ), verbatimTextOutput(outputId = "res") ) server <- function(input, output, session) { output$res <- renderPrint(input$myKnob) } shinyApp(ui = ui, server = server) }