Progression Handler: Progress Reported as a Tcl/Tk Progress Bars in the GUI

Source: R/handler_tkprogressbar.R

A progression handler for tcltk::tkProgressBar().

handler_tkprogressbar(
  intrusiveness = getOption("progressr.intrusiveness.gui", 1),
  target = "terminal",
  inputs = list(title = NULL, label = "message"),
  ...
)

Arguments

intrusiveness

(numeric) A non-negative scalar on how intrusive (disruptive) the reporter to the user.

target

(character vector) Specifies where progression updates are rendered.

inputs

(named list) Specifies from what sources the MS Windows progress elements 'title' and 'label' should be updated. Valid sources are "message", "sticky_message" and "non_sticky_message", where "message" is short for c("non_sticky_message", "sticky_message"). For example, inputs = list(title = "sticky_message", label = "message") will update the 'title' component from sticky messages only, whereas the 'label' component is updated using any message.

...

Additional arguments passed to make_progression_handler().

Requirements

This progression handler requires the tcltk package and that the current R session supports Tcl/Tk (capabilities("tcltk")).

Examples

if (capabilities("tcltk") && requireNamespace("tcltk", quietly = TRUE)) {

  handlers("tkprogressbar")
  with_progress({ y <- slow_sum(1:10) })
  print(y)
  
}
#> M: Added value 1
#> M: Added value 2
#> M: Added value 3
#> M: Added value 4
#> M: Added value 5
#> M: Added value 6
#> M: Added value 7
#> M: Added value 8
#> M: Added value 9
#> M: Added value 10
#> [1] 55