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#'Buttons
#'
#'Twitter Bootstrap gives many options for styling buttons that aren't made
#'available by standard Shiny. Use shinyBS to create buttons of different sizes,
#'shapes, and colors.
#'
#'@section Components:
#'There are two functions in the Buttons family:
#' \describe{
#' \item{\code{\link{bsButton}}}{Used in the UI to create a button. Buttons
#' can be of the type \code{action} or \code{toggle}.}
#' \item{\code{\link{updateButton}}}{Used in the Server logic to modify the
#' state of a button created with \code{\link{bsButton}}}
#' }
#'
#'@details
#'Create a button in the UI with \code{\link{bsButton}}. If \code{type = "action"}
#'the button will behave like the standard \code{\link{actionButton}} in shiny.
#'If \code{type = "toggle"} the button will behave like a \code{\link{checkboxInput}}
#'with an on and off state. It will return \code{TRUE} or \code{FALSE} to the Server
#'depending on its state.
#'
#'You can update the style and state of a \code{\link{bsButton}} from the Server
#'logic with \code{\link{updateButton}}. For example, a button could be set to
#'\code{disabled = TRUE} until the user has made some other selections, then once
#'those selections have been made, an observer on the Server could use \code{\link{updateButton}}
#'to enable the button allowing the user to proceed. Alternatively, you could set
#'the button to \code{style = "success"} to let them know that the button is ready
#'to be clicked.
#'
#'@section Changes:
#'\code{bsActionButton} and \code{bsToggleButton} were replaced with just
#'\code{\link{bsButton}} with a \code{type} argument.
#'
#'\code{icon} was added to allow placing an icon in the button.
#'
#'@examples
#'library(shiny)
#'library(shinyBS)
#'app = shinyApp(
#' ui =
#' fluidPage(
#' sidebarLayout(
#' sidebarPanel(
#' sliderInput("bins",
#' "Move the slider to see its effect on the button below:",
#' min = 1,
#' max = 50,
#' value = 1),
#' bsButton("actTwo", label = "Click me if you dare!", icon = icon("ban")),
#' tags$p("Clicking the first button below changes the disabled state of the second button."),
#' bsButton("togOne", label = "Toggle button disabled status",
#' block = TRUE, type = "toggle", value = TRUE),
#' bsButton("actOne", label = "Block Action Button", block = TRUE)
#'
#' ),
#' mainPanel(
#' textOutput("exampleText")
#' )
#' )
#' ),
#' server =
#' function(input, output, session) {
#' observeEvent(input$togOne, ({
#' updateButton(session, "actOne", disabled = !input$togOne)
#' }))
#' observeEvent(input$bins, ({
#'
#' b <- input$bins
#' disabled = NULL
#' style = "default"
#' icon = ""
#'
#' if(b < 5) {
#' disabled = TRUE
#' icon <- icon("ban")
#' } else {
#' disabled = FALSE
#' }
#'
#' if(b < 15 | b > 35) {
#' style = "danger"
#' } else if(b < 20 | b > 30) {
#' style = "warning"
#' } else {
#' style = "default"
#' icon = icon("check")
#' }
#'
#' updateButton(session, "actTwo", disabled = disabled, style = style, icon = icon)
#'
#' }))
#'
#' output$exampleText <- renderText({
#' input$actTwo
#' b <- isolate(input$bins)
#' txt = ""
#' if((b > 5 & b < 15) | b > 35) {
#' txt = "That was dangerous."
#' } else if((b > 5 & b < 20) | b > 30) {
#' txt = "I warned you about that."
#' } else if(b >= 20 & b <= 30) {
#' txt = "You have chosen... wisely."
#' }
#' return(txt)
#' })
#' }
#')
#'\dontrun{
#' runApp(app)
#'}
#'@templateVar item_name Buttons
#'@templateVar family_name Buttons
#'@template footer
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