Picker input to select color(s) or palette — input-colors • esquisse

Select menu to view and choose a color or a palette of colors.

Usage

colorPicker(
  inputId,
  label,
  choices,
  selected = NULL,
  textColor = "#000",
  plainColor = FALSE,
  multiple = FALSE,
  pickerOpts = list(),
  width = NULL
)

updateColorPicker(
  session = getDefaultReactiveDomain(),
  inputId,
  choices,
  textColor = "#000",
  plainColor = FALSE,
  multiple = FALSE
)

palettePicker(
  inputId,
  label,
  choices,
  selected = NULL,
  textColor = "#000",
  plainColor = FALSE,
  pickerOpts = list(),
  width = NULL
)

updatePalettePicker(
  session = getDefaultReactiveDomain(),
  inputId,
  choices,
  selected = NULL,
  textColor = "#000",
  plainColor = FALSE
)

Arguments

inputId: The input slot that will be used to access the value.
label: Display label for the control, or NULL for no label.
choices: List of values to select from. Values must be valid Hex colors. If elements of the list are named then that name rather than the value is displayed to the user.
selected: The initially selected value (or multiple values if multiple = TRUE). If not specified then defaults to the first value for single-select lists and no values for multiple select lists.
textColor: Color of the text displayed above colors, can be a vector of the same length as choices.
plainColor: Color the full space of the choice menu.
multiple: Is selection of multiple items allowed?
pickerOpts: Options for pickerInput.
width: The width of the input : 'auto', 'fit', '100px', '75%'.
session: Shiny session.

Value

A select control that can be added to a UI definition.

Examples


# colorPicker -------------------------------------------------------------

library(shiny)
library(esquisse)
library(scales)


ui <- fluidPage(
  tags$h2("colorPicker examples"),
  fluidRow(
    column(
      width = 3,
      colorPicker(
        inputId = "col1",
        label = "With a vector of colors:",
        choices = brewer_pal(palette = "Dark2")(8)
      ),
      verbatimTextOutput("res1"),
      colorPicker(
        inputId = "col5",
        label = "Update colors:",
        choices = brewer_pal(palette = "Blues", direction = -1)(8),
        textColor = "#FFF"
      ),
      verbatimTextOutput("res5"),
      radioButtons(
        "update", "Colors", c("Blues", "Greens", "Reds"),
        inline = TRUE
      )
    ),
    column(
      width = 3,
      colorPicker(
        inputId = "col2",
        label = "Change text color:",
        choices = brewer_pal(palette = "Blues")(8), 
        textColor = c("black", "black", "black", "white",
                      "white", "white", "white", "white")
      ),
      verbatimTextOutput("res2")
    ),
    column(
      width = 3,
      colorPicker(
        inputId = "col3",
        label = "With a list of vector of colors:",
        choices = list(
          "Blues" = brewer_pal(palette = "Blues")(8),
          "Reds" = brewer_pal(palette = "Reds")(8),
          "Greens" = brewer_pal(palette = "Greens")(8)
        )
      ),
      verbatimTextOutput("res3")
    ),
    column(
      width = 3,
      colorPicker(
        inputId = "col4",
        label = "Plain color & multiple choices:",
        choices = brewer_pal(palette = "Paired")(8), 
        plainColor = TRUE, 
        multiple = TRUE, 
        pickerOpts = list(`selected-text-format`= "count > 3")
      ),
      verbatimTextOutput("res4")
    )
  )
)

server <- function(input, output, session) {
  
  output$res1 <- renderPrint(input$col1)
  output$res2 <- renderPrint(input$col2)
  output$res3 <- renderPrint(input$col3)
  output$res4 <- renderPrint(input$col4)
  output$res5 <- renderPrint(input$col5)
  
  observeEvent(input$update, {
    updateColorPicker(
      inputId = "col5",
      choices = brewer_pal(palette = input$update, direction = -1)(8),
      textColor = "#FFF"
    )
  })
  
}

if (interactive()) {
  shinyApp(ui, server)
}

# palettePicker -----------------------------------------------------------

library(shiny)
library(esquisse)
library(scales)

ui <- fluidPage(
  tags$h2("pickerColor examples"),
  
  fluidRow(
    column(
      width = 4,
      palettePicker(
        inputId = "pal1", 
        label = "Select a palette:", 
        choices = list(
          "Blues" = brewer_pal(palette = "Blues")(8),
          "Reds" = brewer_pal(palette = "Reds")(8)
        )
      ),
      verbatimTextOutput("res1"),
      palettePicker(
        inputId = "pal4", 
        label = "Update palette:", 
        choices = list(
          "Blues" = brewer_pal(palette = "Blues")(8),
          "Reds" = brewer_pal(palette = "Reds")(8)
        )
      ),
      verbatimTextOutput("res4"),
      radioButtons(
        "update", "Palettes:", c("default", "viridis", "brewer"),
        inline = TRUE
      )
    ),
    column(
      width = 4,
      palettePicker(
        inputId = "pal2", 
        label = "With a list of palette:", 
        choices = list(
          "Viridis" = list(
            "viridis" = viridis_pal(option = "viridis")(10),
            "magma" = viridis_pal(option = "magma")(10),
            "inferno" = viridis_pal(option = "inferno")(10),
            "plasma" = viridis_pal(option = "plasma")(10),
            "cividis" = viridis_pal(option = "cividis")(10)
          ),
          "Brewer" = list(
            "Blues" = brewer_pal(palette = "Blues")(8),
            "Reds" = brewer_pal(palette = "Reds")(8),
            "Paired" = brewer_pal(palette = "Paired")(8),
            "Set1" = brewer_pal(palette = "Set1")(8)
          )
        ), 
        textColor = c(
          rep("white", 5), rep("black", 4) 
        )
      ),
      verbatimTextOutput("res2")
    ),
    column(
      width = 4,
      palettePicker(
        inputId = "pal3", 
        label = "With plain colors:", 
        choices = list(
          "BrBG" = brewer_pal(palette = "BrBG")(8), 
          "PiYG" = brewer_pal(palette = "PiYG")(8), 
          "PRGn" = brewer_pal(palette = "PRGn")(8), 
          "PuOr" = brewer_pal(palette = "PuOr")(8), 
          "RdBu" = brewer_pal(palette = "RdBu")(8), 
          "RdGy" = brewer_pal(palette = "RdGy")(8), 
          "RdYlBu" = brewer_pal(palette = "RdYlBu")(8), 
          "RdYlGn" = brewer_pal(palette = "RdYlGn")(8), 
          "Spectral" = brewer_pal(palette = "Spectral")(8)
        ), 
        plainColor = TRUE, 
        textColor = "white"
      ),
      verbatimTextOutput("res3")
    )
  )
)

server <- function(input, output, session) {
  
  output$res1 <- renderPrint(input$pal1)
  output$res2 <- renderPrint(input$pal2)
  output$res3 <- renderPrint(input$pal3)
  output$res4 <- renderPrint(input$pal4)
  
  observeEvent(input$update, {
    if (input$update == "default") {
      updatePalettePicker(
        inputId = "pal4",
        choices = list(
          "Blues" = brewer_pal(palette = "Blues")(8),
          "Reds" = brewer_pal(palette = "Reds")(8)
        )
      )
    } else if (input$update == "viridis") {
      updatePalettePicker(
        inputId = "pal4",
        choices = list(
          "viridis" = viridis_pal(option = "viridis")(10),
          "magma" = viridis_pal(option = "magma")(10),
          "inferno" = viridis_pal(option = "inferno")(10),
          "plasma" = viridis_pal(option = "plasma")(10),
          "cividis" = viridis_pal(option = "cividis")(10)
        ),
        textColor = "#FFF"
      )
    } else if (input$update == "brewer") {
      updatePalettePicker(
        inputId = "pal4",
        choices = list(
          "Blues" = brewer_pal(palette = "Blues")(8),
          "Reds" = brewer_pal(palette = "Reds")(8),
          "Paired" = brewer_pal(palette = "Paired")(8),
          "Set1" = brewer_pal(palette = "Set1")(8)
        )
      )
    }
  })
}

if (interactive()) {
  shinyApp(ui, server)
}