dccSlider: Slider component

In dash: An Interface to the Dash Ecosystem for Authoring Reactive Web Applications

Slider component

Description

A slider component with a single handle.

Usage

dccSlider(id=NULL, min=NULL, max=NULL, step=NULL, marks=NULL,
value=NULL, drag_value=NULL, className=NULL, disabled=NULL,
dots=NULL, included=NULL, tooltip=NULL, vertical=NULL,
verticalHeight=NULL, updatemode=NULL, loading_state=NULL,
persistence=NULL, persisted_props=NULL,
persistence_type=NULL)

Arguments

id	Character. The ID of this component, used to identify dash components in callbacks. The ID needs to be unique across all of the components in an app.
min	Numeric. Minimum allowed value of the slider
max	Numeric. Maximum allowed value of the slider
step	Numeric. Value by which increments or decrements are made
marks	List with named elements and values of type character | lists containing elements 'label', 'style'. those elements have the following types: - label (character; optional) - style (named list; optional). Marks on the slider. The key determines the position (a number), and the value determines what will show. If you want to set the style of a specific mark point, the value should be an object which contains style and label properties.
value	Numeric. The value of the input
drag_value	Numeric. The value of the input during a drag
className	Character. Additional CSS class for the root DOM node
disabled	Logical. If true, the handles can't be moved.
dots	Logical. When the step value is greater than 1, you can set the dots to true if you want to render the slider with dots.
included	Logical. If the value is true, it means a continuous value is included. Otherwise, it is an independent value.
tooltip	Lists containing elements 'always_visible', 'placement'. those elements have the following types: - always_visible (logical; optional): determines whether tooltips should always be visible (as opposed to the default, visible on hover) - placement (a value equal to: 'left', 'right', 'top', 'bottom', 'topleft', 'topright', 'bottomleft', 'bottomright'; optional): determines the placement of tooltips see https://github.com/react-component/tooltip#api top/bottom* sets the _origin_ of the tooltip, so e.g. 'topleft' will in reality appear to be on the top right of the handle. Configuration for tooltips describing the current slider value
vertical	Logical. If true, the slider will be vertical
verticalHeight	Numeric. The height, in px, of the slider if it is vertical.
updatemode	A value equal to: 'mouseup', 'drag'. Determines when the component should update its 'value' property. If 'mouseup' (the default) then the slider will only trigger its value when the user has finished dragging the slider. If 'drag', then the slider will update its value continuously as it is being dragged. If you want different actions during and after drag, leave 'updatemode' as 'mouseup' and use 'drag_value' for the continuously updating value.
loading_state	Lists containing elements 'is_loading', 'prop_name', 'component_name'. those elements have the following types: - is_loading (logical; optional): determines if the component is loading or not - prop_name (character; optional): holds which property is loading - component_name (character; optional): holds the name of the component that is loading. Object that holds the loading state object coming from dash-renderer
persistence	Logical | character | numeric. Used to allow user interactions in this component to be persisted when the component - or the page - is refreshed. If 'persisted' is truthy and hasn't changed from its previous value, a 'value' that the user has changed while using the app will keep that change, as long as the new 'value' also matches what was given originally. Used in conjunction with 'persistence_type'.
persisted_props	List of a value equal to: 'value's. Properties whose user interactions will persist after refreshing the component or the page. Since only 'value' is allowed this prop can normally be ignored.
persistence_type	A value equal to: 'local', 'session', 'memory'. Where persisted user changes will be stored: memory: only kept in memory, reset on page refresh. local: window.localStorage, data is kept after the browser quit. session: window.sessionStorage, data is cleared once the browser quit.

Value

named list of JSON elements corresponding to React.js properties and their values

Examples

if (interactive()) {
    library(dash)

    app <- Dash$new()

    app$layout(
      htmlDiv(
        list(
          dccSlider(
            id = "slider-input",
            min = -5,
            max = 10,
            step = 0.5,
            value = -3
          ),
          htmlDiv(
            id = "slider-output",
            children = "Make a selection on the slider to see the value appear here."
          )
        )
      )
    )

    app$callback(
      output("slider-output", "children"),
      list(input("slider-input", "value")),
      function(value) {
        return(paste0("You have chosen ", value, " on the slider above."))
      }
    )

   app$run_server()
}

dash documentation built on June 23, 2022, 9:11 a.m.