Build a ggpaintr Shiny App — ptr

Create a Shiny app from a single ggplot-like formula string. The app exposes generated controls, a draw button, inline error handling, and code output.

Usage

ptr_app(
  formula,
  envir = parent.frame(),
  ui_text = NULL,
  placeholders = NULL,
  expr_check = TRUE
)

Arguments

formula: A single formula string using ggpaintr placeholders.
envir: Environment used to resolve local data objects when building the app.
ui_text: Optional named list of copy overrides for UI labels, helper text, and placeholders.
placeholders: Optional custom placeholder definitions or an existing placeholder registry.
expr_check: Controls expr placeholder validation. TRUE (default) applies the built-in denylist of dangerous functions. FALSE disables all checking. A named list with deny_list and/or allow_list character vectors supplies a custom check; when both are given, denied entries are removed from the allowlist.

Value

A shiny.appobj.

Examples

app <- ptr_app("ggplot(data = mtcars, aes(x = var, y = var)) + geom_point()")
inherits(app, "shiny.appobj")
#> [1] TRUE