library(shiny)
library(dndselectr)
`%||%` <- function(a, b) if (is.null(a)) b else a
shinyApp(
ui = fluidPage(
fluidRow(
column(6,
h3("Dragzone"),
dragZone("dragzone",
choices = list(one = "One",
two = "Two",
three = "Three",
four = "Four")),
h3("Dropzone Values"),
verbatimTextOutput("showme")
),
column(6,
h3("Dropzones"),
selectInput("whichzone",
label = "Which Zone?",
choices = list(stevezone = "Steve", fredzone = "Fred"),
selected = "Steve"),
uiOutput("pickedzone")
)
)
),
server = function(input, output) {
output$showme <- renderText({
paste(paste("Steve: ", paste(input[["Steve"]], collapse=" ")),
paste("Fred: ", paste(input[["Fred"]], collapse=" ")),
sep = "\n")
})
output$pickedzone <- renderUI({
dropZoneInput(input$whichzone %||% "stevezone",
choices = list(one = "1",
two = "2",
three = "3",
four = "4"),
multivalued = TRUE,
presets = input[[input$whichzone %||% "stevezone"]])
})
}
)
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