Drag And Drop Input Widget

Drag And Drop Input Widget

dragulaInput(
  inputId,
  label = NULL,
  sourceLabel,
  targetsLabels,
  targetsIds = NULL,
  choices = NULL,
  choiceNames = NULL,
  choiceValues = NULL,
  selected = NULL,
  status = "primary",
  replace = FALSE,
  copySource = TRUE,
  badge = TRUE,
  ncolSource = "auto",
  ncolGrid = NULL,
  dragulaOpts = list(),
  boxStyle = NULL,
  width = NULL,
  height = "100px"
)

Arguments

inputId

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

label

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

sourceLabel

Label display in the source box

targetsLabels

Labels for each target element.

targetsIds

Ids for retrieving values server-side, if NULL, the default, targetsLabels are used after removing all not-alphanumeric characters.

choices

List of values to select from (if elements of the list are named then that name rather than the value is displayed to the user). If this argument is provided, then choiceNames and choiceValues must not be provided, and vice-versa. The values should be strings; other types (such as logicals and numbers) will be coerced to strings.

choiceNames, choiceValues

List of names and values, respectively, that are displayed to the user in the app and correspond to the each choice (for this reason, choiceNames and choiceValues must have the same length). If either of these arguments is provided, then the other must be provided and choices must not be provided. The advantage of using both of these over a named list for choices is that choiceNames allows any type of UI object to be passed through (tag objects, icons, HTML code, ...), instead of just simple text.

selected

Default selected values. Must be a list with targetsIds as names.

status

If choices are displayed into a Bootstrap label, you can use Bootstrap status to color them, or NULL.

replace

When a choice is dragged in a target container already containing a choice, does the later be replaced by the new one ?

copySource

When replace = TRUE, does elements in source must be copied or moved ?

badge

Displays choices inside a Bootstrap badge. Use FALSE if you want to pass custom appearance with choiceNames.

ncolSource

Number of columns occupied by the source, default is "auto", meaning full row.

ncolGrid

Number of columns used to place source and targets boxes, see examples.

dragulaOpts

Options passed to dragula JavaScript library.

boxStyle

CSS style string to customize source and target container.

width

Width of the input.

height

Height of each boxes, the total input height is this parameter X 2.

Value

a UI definition

Note

The output server-side is a list with two slots: source and targets.

See also

updateDragulaInput() to update choices server-side.

Examples

library(shiny)
library(esquisse)

ui <- fluidPage(
  tags$h2("Demo dragulaInput"),
  tags$br(),
  fluidRow(
    column(
      width = 6,
      
      dragulaInput(
        inputId = "dad1",
        label = "Default:",
        sourceLabel = "Source",
        targetsLabels = c("Target 1", "Target 2"),
        choices = month.abb,
        width = "100%"
      ),
      verbatimTextOutput(outputId = "result1"),
      
      tags$br(),
      
      dragulaInput(
        inputId = "dad3",
        label = "On same row:",
        sourceLabel = "Source",
        targetsLabels = c("Target 1", "Target 2"),
        choices = month.abb,
        width = "100%",
        ncolSource = 1,
        ncolGrid = 3
      ),
      verbatimTextOutput(outputId = "result3")
    ),
    
    column(
      width = 6,
      dragulaInput(
        inputId = "dad2",
        label = "Two rows:",
        sourceLabel = "Source",
        targetsLabels = c("x", "y", "color", "fill", "size", "facet"),
        choices = names(mtcars),
        width = "100%",
        ncolGrid = 3
      ),
      verbatimTextOutput(outputId = "result2"),
      
      tags$br(),
      
      dragulaInput(
        inputId = "dad4",
        label = "Two rows not filled:",
        sourceLabel = "Source",
        targetsLabels = c("x", "y", "color", "fill", "size"),
        choices = names(mtcars),
        width = "100%",
        ncolGrid = 3
      ),
      verbatimTextOutput(outputId = "result4")
    )
  )
)


server <- function(input, output, session) {
  
  output$result1 <- renderPrint(str(input$dad1))
  
  output$result2 <- renderPrint(str(input$dad2))
  
  output$result3 <- renderPrint(str(input$dad3))
  
  output$result4 <- renderPrint(str(input$dad4))
  
}

if (interactive())
  shinyApp(ui = ui, server = server)