R: Allow Tcl events to be serviced or not

tclServiceMode {tcltk} | R Documentation

## Allow Tcl events to be serviced or not

### Description

This function controls or reports on the Tcl service mode, i.e., whether Tcl will respond to events.

### Usage

    tclServiceMode(on = NULL)

### Arguments

`on` | (logical) Whether event servicing is turned on.

### Details

If called with `on == NULL` (the default), no change is made.

Note that this blocks all Tcl/Tk activity, including for widgets from other packages. It may be better to manage mapping of windows individually.

### Value

The value of the Tcl service mode before the call.

### Examples

    ## see demo(tkcanvas) for an example
    ## Not run:
    oldmode <- tclServiceMode(FALSE)
    # Do some work to create a nice picture.
    # Nothing will be displayed until...
    tclServiceMode(oldmode)

    ## End(Not run)
    ## another idea is to use tkwm.withdraw() ... tkwm.deiconify()

[Package tcltk version 3.5.1 Index]