Slider page — slider_page • psychTestR

Creates a page where the participant responds by manipulating a slider.

slider_page(
  label,
  prompt,
  min,
  max,
  value,
  save_answer = TRUE,
  button_text = "Next",
  on_complete = NULL,
  admin_ui = NULL,
  step = NULL,
  round = FALSE,
  ticks = TRUE,
  animate = FALSE,
  width = NULL,
  sep = ",",
  pre = NULL,
  post = NULL,
  timeFormat = NULL,
  timezone = NULL,
  dragRange = TRUE
)

Arguments

label: Label for the current page (character scalar).
prompt: Prompt to display (character scalar or Shiny tag object).
min, max: The minimum and maximum values (inclusive) that can be selected.
value: The initial value of the slider, either a number, a date (class Date), or a date-time (class POSIXt). A length one vector will create a regular slider; a length two vector will create a double-ended range slider. Must lie between min and max.
save_answer: Whether or not to save the answer.
button_text: Text for the submit button (character scalar).
on_complete: Optional function to execute on leaving the page (after successful validation). The argument list should include ..., and any of: state, the participant's state object; answer, the participant's most recent answer; input, the current page's Shiny input object; session, the current Shiny session object; opt, the test's option list as created by test_options().
admin_ui: Optional UI component for the admin panel.
step: Specifies the interval between each selectable value on the slider. Either NULL, the default, which uses a heuristic to determine the step size or a single number. If the values are dates, step is in days; if the values are date-times, step is in seconds.
round: TRUE to round all values to the nearest integer; FALSE if no rounding is desired; or an integer to round to that number of digits (for example, 1 will round to the nearest 10, and -2 will round to the nearest .01). Any rounding will be applied after snapping to the nearest step.
ticks: FALSE to hide tick marks, TRUE to show them according to some simple heuristics.
animate: TRUE to show simple animation controls with default settings; FALSE not to; or a custom settings list, such as those created using animationOptions().
width: The width of the input, e.g. '400px', or '100%'; see validateCssUnit().
sep: Separator between thousands places in numbers.
pre: A prefix string to put in front of the value.
post: A suffix string to put after the value.
timeFormat: Only used if the values are Date or POSIXt objects. A time format string, to be passed to the Javascript strftime library. See https://github.com/samsonjs/strftime for more details. The allowed format specifications are very similar, but not identical, to those for R's base::strftime() function. For Dates, the default is "%F" (like "2015-07-01"), and for POSIXt, the default is "%F %T" (like "2015-07-01 15:32:10").
timezone: Only used if the values are POSIXt objects. A string specifying the time zone offset for the displayed times, in the format "+HHMM" or "-HHMM". If NULL (the default), times will be displayed in the browser's time zone. The value "+0000" will result in UTC time.
dragRange: This option is used only if it is a range slider (with two values). If TRUE (the default), the range can be dragged. In other words, the min and max can be dragged together. If FALSE, the range cannot be dragged.

Note

The RStudio preview function seems not to work for slider pages on some machines.